Patents 5521480 - 5521734

 

 

Patent 5521480: Apparatus and method for defining a reference position of a tool
(ELECTRICITY: MOTIVE POWER SYSTEMS : POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) : Limit or end-stop control : By deadband at null (e.g., threshold circuits))

Patent 5521481: Speed estimation observer applied to speed control system for motor
(ELECTRICITY: MOTIVE POWER SYSTEMS : POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) : With compensating features : Secto-scanning systems)

Patent 5521482: Method and apparatus for determining mechanical performance of polyphase electrical motor systems
(ELECTRICITY: MOTIVE POWER SYSTEMS : INDUCTION MOTOR SYSTEMS : Primary circuit control : Responsive to motor condition : Responsive to speed or rotation phase angle : With controlled power conversion : With plural capacitors)

Patent 5521483: Method of determining a residual flux of an inverter-supplied squirrel cage/induction machine
(ELECTRICITY: MOTIVE POWER SYSTEMS : INDUCTION MOTOR SYSTEMS : Primary circuit control : Responsive to motor condition : Responsive to speed or rotation phase angle : With controlled magnetic reactance : Including inverter)

Patent 5521485: Regulator circuit with progressive excitation for charging a battery by means of an alternator
(ELECTRICITY: SINGLE GENERATOR SYSTEMS : AUTOMATIC CONTROL OF GENERATOR OR DRIVING MEANS : Voltage of generator or circuit supplied : Including an electrical condition)

Patent 5521486: Charging generator with self-diagnosis function
(ELECTRICITY: SINGLE GENERATOR SYSTEMS : WITH SIGNALS, INDICATORS, RECORDERS, TESTING, ETC. : With armature or primary circuit control)

Patent 5521487: Active filter for single-phase overhead contact wire energized locomotive
(ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS : FOR REACTIVE POWER CONTROL : Using converter :)

Patent 5521488: Voltage regulator and method therefor
(ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS : IN SHUNT WITH SOURCE OR LOAD : Using a three or more terminal semiconductive device : In bridge)

Patent 5521489: Overheat detecting circuit
(ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS : SELF-REGULATING (E.G., NONRETROACTIVE) : Using a three or more terminal semiconductive device as the final control device : For current stabilization : To derive a voltage reference (e.g., band gap regulator) : Including a ferrocapacitor across a tertiary winding)

Patent 5521490: Current mirror with improved input voltage headroom
(ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS : SELF-REGULATING (E.G., NONRETROACTIVE) : Using a three or more terminal semiconductive device as the final control device : For current stabilization : Including parallel paths (e.g., current mirror) : With additional stage)

Patent 5521491: Phase detecting device for determining phase angle between two electrical signals
(ELECTRICITY: MEASURING AND TESTING : MEASURING, TESTING, OR SENSING ELECTRICITY, PER SE : Phase comparison (e.g., between cyclic pulse voltage and sinusoidal current, etc.) : Polyphase (e.g., phase angle, phase rotation or sequence) : Deviation measurement)

Patent 5521492: Analog input method
(ELECTRICITY: MEASURING AND TESTING : MEASURING, TESTING, OR SENSING ELECTRICITY, PER SE : Self-calibration : Selective filter)

Patent 5521493: Semiconductor test system including a novel driver/load circuit
(ELECTRICITY: MEASURING AND TESTING : MISCELLANEOUS : Combined)

Patent 5521494: Inductive displacement sensor including an autotransformer and an inductance effecting means extending between 90 and 180 electrical
(ELECTRICITY: MEASURING AND TESTING : MAGNETIC : Displacement : Having particular sensor means : Inductive : Electrically energized : Pulsating or alternating current for the anode)

Patent 5521495: Sensor for contactless determination of an angle of rotation of a rotatable structural element
(ELECTRICITY: MEASURING AND TESTING : MAGNETIC : Displacement : Having particular sensor means : Inductive : Electrically energized : Differential type (e.g., LVDT) : Including plural current focussing arrays)

Patent 5521496: Detection circuits for position sensors
(ELECTRICITY: MEASURING AND TESTING : MAGNETIC : Displacement : Having particular sensor means : Inductive : Electrically energized : Differential type (e.g., LVDT) : Including plural current focussing arrays)

Patent 5521497: Measuring arrangement for contactlessly detecting the distance between two components
(ELECTRICITY: MEASURING AND TESTING : MAGNETIC : Displacement : Having particular sensed object : Magnetoresistive)

Patent 5521498: Device for sensing the thickness of strip material in particular in devices for changing rolls of metallized strip material automatically
(ELECTRICITY: MEASURING AND TESTING : MAGNETIC : With means to create magnetic field to test material : Thickness measuring : Borehole pipe testing)

Patent 5521499: Signal controlled phase shifter
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SIGNAL CONVERTING, SHAPING, OR GENERATING : Phase shift by less than period of input : Variable or adjustable : By phase comparator or detector)

Patent 5521500: Thin-film magnetic field detector having transverse current and voltage paths intersecting in a common plane
(ELECTRICITY: MEASURING AND TESTING : MAGNETIC : Magnetometers : Thin film magnetometers : Plural sensors)

Patent 5521501: Magnetic field sensor constructed from a remagnetization line and one magnetoresistive resistor or a plurality of magnetoresistive resistors
(ELECTRICITY: MEASURING AND TESTING : MAGNETIC : Magnetometers : Semiconductor type solid-state or magnetoresistive magnetometers : Plural sensors)

Patent 5521502: Flow differentiation scheme for magnetic resonance angiography
(ELECTRICITY: MEASURING AND TESTING : PARTICLE PRECESSION RESONANCE : Determine fluid flow rate : Having particular optical cell structure)

Patent 5521503: Selective control of magnetization transfer in multiple-site exchange systems
(ELECTRICITY: MEASURING AND TESTING : PARTICLE PRECESSION RESONANCE : Using a nuclear resonance spectrometer system : Having particular optical cell structure)

Patent 5521504: Pulse sequence and method for creating a radio-frequency magnetic field gradient with a spatially independent phase for NMR experiments
(ELECTRICITY: MEASURING AND TESTING : PARTICLE PRECESSION RESONANCE : Using a nuclear resonance spectrometer system : To obtain localized resonance within a sample :)

Patent 5521505: MR imaging apparatus
(ELECTRICITY: MEASURING AND TESTING : PARTICLE PRECESSION RESONANCE : Using a nuclear resonance spectrometer system : To obtain localized resonance within a sample :)

Patent 5521506: Orthogonal adjustment of magnetic resonance surface coils
(ELECTRICITY: MEASURING AND TESTING : PARTICLE PRECESSION RESONANCE : Spectrometer components : Electronic circuit elements : With homogeneity control)

Patent 5521507: Gradient coil power supply and imaging method
(ELECTRICITY: MEASURING AND TESTING : PARTICLE PRECESSION RESONANCE : Spectrometer components : Electronic circuit elements : With homogeneity control)

Patent 5521508: Method and apparatus for predicting the occurrence of an earthquake by identifying electromagnetic precursors
(ELECTRICITY: MEASURING AND TESTING : OF GEOPHYSICAL SURFACE OR SUBSURFACE IN SITU : By magnetic means : With separate pickup)

Patent 5521509: Device of estimating heat resistivity for a spark plug and a method of estimating the same
(ELECTRICITY: MEASURING AND TESTING : INTERNAL-COMBUSTION ENGINE IGNITION SYSTEM OR DEVICE : In situ testing of spark plug : Using a pulse signal technique)

Patent 5521510: Process for monitoring for organic impurities in water
(ELECTRICITY: MEASURING AND TESTING : ELECTROLYTE PROPERTIES : Using a conductivity determining device : Including probe structure)

Patent 5521511: Method and device for testing integrated power devices
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : For fault location : By voltage or current measuring : Using a particular sensing electrode)

Patent 5521512: Time domain reflectometer using successively delayed test pulses and an interleaved sampling procedure
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : For fault location : By applying a test signal : Using time measuring : Of reflected test signal : Differential bridge circuit)

Patent 5521513: Manufacturing defect analyzer
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : By spark or arc discharge)

Patent 5521514: Broken tine detector for agricultural machines
(ELECTRICITY: MEASURING AND TESTING : IMPEDANCE, ADMITTANCE OR OTHER QUANTITIES REPRESENTATIVE OF ELECTRICAL STIMULUS/RESPONSE RELATIONSHIPS : Lumped type parameters : Using capacitive type measurement : With variable electrode area : Using a bridge circuit)

Patent 5521515: Frequency scanning capaciflector for capacitively determining the material properties
(ELECTRICITY: MEASURING AND TESTING : IMPEDANCE, ADMITTANCE OR OTHER QUANTITIES REPRESENTATIVE OF ELECTRICAL STIMULUS/RESPONSE RELATIONSHIPS : Lumped type parameters : Using capacitive type measurement : Where a material or object forms part of the dielectric being measured : By frequency signal response, change or processing circuit : Including a bridge circuit)

Patent 5521516: Semiconductor integrated circuit fault analyzing apparatus and method therefor
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : System sensing fields adjacent device under test (DUT) : Using electron beam probe : Of reflected test signal)

Patent 5521517: Method and apparatus for detecting an IC defect using a charged particle beam
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : System sensing fields adjacent device under test (DUT) : Using electron beam probe : Of reflected test signal)

Patent 5521518: Probe card apparatus
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : With probe elements : Using electro-optic device)

Patent 5521519: Spring probe with piloted and headed contact and method of tip formation
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : With probe elements : Using electro-optic device)

Patent 5521520: Method and apparatus for checking parts to be measured using a belt-like connection member
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : With probe elements : Using electro-optic device)

Patent 5521521: Testing contactor for small-size semiconductor devices
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : With probe elements : Internal of or on support for device under test (DUT) : Of reflected test signal)

Patent 5521522: Probe apparatus for testing multiple integrated circuit dies
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : With probe elements : Probe alignment or positioning : Of reflected test signal)

Patent 5521523: Probe card assembly and method of manufacturing probe card assembly
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : With probe elements : With temperature control : Of reflected test signal)

Patent 5521524: Method and system for screening reliability of semiconductor circuits
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : Test of semiconductor device : Cantilever)

Patent 5521525: Method and apparatus for measuring the doping density profile of a semiconductor layer
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : Test of semiconductor device : Cantilever)

Patent 5521526: Method and a device for checking the condition of semiconductor valves
(ELECTRICITY: MEASURING AND TESTING : FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS : Of individual circuit component or element : Test of semiconductor device : Cantilever)

Patent 5521527: Semiconductor integrated circuits with power reduction mechanism
(ELECTRONIC DIGITAL LOGIC CIRCUITRY : SIGNAL SENSITIVITY OR TRANSMISSION INTEGRITY : Bipolar transistor)

Patent 5521528: Controllable bus terminator
(ELECTRONIC DIGITAL LOGIC CIRCUITRY : SIGNAL SENSITIVITY OR TRANSMISSION INTEGRITY : Bus or line termination (e.g., clamping, impedance matching, etc.) : With field effect-transistor)

Patent 5521529: Very high-density complex programmable logic devices with a multi-tiered hierarchical switch matrix and optimized flexible logic allocation
(ELECTRONIC DIGITAL LOGIC CIRCUITRY : MULTIFUNCTIONAL OR PROGRAMMABLE (E.G., UNIVERSAL, ETC.) : Array (e.g., PLA, PAL, PLD, etc.) : Significant integrated structure, layout, or layout interconnections : With clocking)

Patent 5521530: Efficient method and resulting structure for integrated circuits with flexible I/O interface and power supply voltages
(ELECTRONIC DIGITAL LOGIC CIRCUITRY : INTERFACE (E.G., CURRENT DRIVE, LEVEL SHIFT, ETC.) : Supply voltage level shifting (i.e., interface between devices of a same logic family with different operating voltage levels) : Bipolar transistor)

Patent 5521531: CMOS bidirectional transceiver/translator operating between two power supplies of different voltages
(ELECTRONIC DIGITAL LOGIC CIRCUITRY : INTERFACE (E.G., CURRENT DRIVE, LEVEL SHIFT, ETC.) : Supply voltage level shifting (i.e., interface between devices of a same logic family with different operating voltage levels) : CMOS : Integrated Injection Logic (I2L))

Patent 5521532: Digital synthesizer controlled microwave frequency signal source
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SIGNAL CONVERTING, SHAPING, OR GENERATING : Synthesizer : With logic or bistable circuit)

Patent 5521533: Apparatus and method for spurious signal reduction in direct-digital synthesizers
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SIGNAL CONVERTING, SHAPING, OR GENERATING : Synthesizer : Having digital device (e.g., logic gate, flip-flop, etc.) : Sample and hold)

Patent 5521534: Numerically controlled oscillator for generating a digitally represented sine wave output signal
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SIGNAL CONVERTING, SHAPING, OR GENERATING : Generating sinusoidal output : With rectifying element)

Patent 5521535: Transistor circuit with a self-holding circuit for a relay
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SIGNAL CONVERTING, SHAPING, OR GENERATING : Particular stable state circuit (e.g., tristable, etc.) : Circuit having only two stable states (i.e., bistable) : Four or more layer device, (e.g., trigistor, etc.))

Patent 5521536: Integrated circuit device having different signal transfer circuits for wirings with different lengths
(ELECTRONIC DIGITAL LOGIC CIRCUITRY : INTERFACE (E.G., CURRENT DRIVE, LEVEL SHIFT, ETC.) : Current driving (e.g., fan in/out, off chip driving, etc.) : CMOS)

Patent 5521537: Bus interface logic integrated circuit
(ELECTRONIC DIGITAL LOGIC CIRCUITRY : INTERFACE (E.G., CURRENT DRIVE, LEVEL SHIFT, ETC.) : Current driving (e.g., fan in/out, off chip driving, etc.) : Field-effect transistor : Bus driving : Having plural output pull-up or pull-down transistors)

Patent 5521538: Adiabatic logic
(ELECTRONIC DIGITAL LOGIC CIRCUITRY : CLOCKING OR SYNCHRONIZING OF LOGIC STAGES OR GATES : Current driving (e.g., fan in/out, off chip driving, etc.))

Patent 5521539: Delay line providing an adjustable delay
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SIGNAL CONVERTING, SHAPING, OR GENERATING : Having specific delay in producing output waveform : Multiple outputs with plurality of delay intervals : Having specific active circuit element or structure(e.g., FET, complementary transistors, etc.) : Differential amplifier : Resistor in cross-coupling path)

Patent 5521540: Method and apparatus for multi-range delay control
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SIGNAL CONVERTING, SHAPING, OR GENERATING : Having specific delay in producing output waveform : Single output with variable or selectable delay : Including delay line or charge transfer device : Electron tube)

Patent 5521541: Semiconductor device capable of reducing a clock skew in a plurality of wiring pattern blocks
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SIGNAL CONVERTING, SHAPING, OR GENERATING : Clock or pulse waveform generating : Plural outputs : Clock bus : Electron tube)

Patent 5521542: Logarithmic amplifier circuit using triple-tail cells
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SPECIFIC INPUT TO OUTPUT FUNCTION : Logarithmic : With summing : RMS)

Patent 5521543: Averaging circuit
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SPECIFIC INPUT TO OUTPUT FUNCTION : Combining of plural signals : With vacuum tube)

Patent 5521544: Multiplier circuit having circuit wide dynamic range with reduced supply voltage requirements
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SPECIFIC INPUT TO OUTPUT FUNCTION : Combining of plural signals : Product : RMS)

Patent 5521545: Collector-injection mixer with radio frequency signal applied to collectors of lower transistor pair
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SPECIFIC INPUT TO OUTPUT FUNCTION : Combining of plural signals : Product : Differential amplifier : Field-effect type device)

Patent 5521546: Voltage boosting circuit constructed on an integrated circuit substrate, as for a semiconductor memory device
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SPECIFIC IDENTIFIABLE DEVICE, CIRCUIT, OR SYSTEM : With specific source of supply or bias voltage : Having particular substrate biasing : Having stabilized bias or power supply level : Charge pump details : With emitter follower)

Patent 5521547: Boost voltage generating circuit
(MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS : SPECIFIC IDENTIFIABLE DEVICE, CIRCUIT, OR SYSTEM : With specific source of supply or bias voltage : Having particular substrate biasing : Having stabilized bias or power supply level : With field-effect transistor : With emitter follower)

Patent 5521548: Phase detector
(DEMODULATORS : PHASE SHIFT KEYING OR QUADRATURE AMPLITUDE DEMODULATOR : Input signal combined with local oscillator or carrier frequency signal :)

Patent 5521549: Stabilization of closed-loop power controllers
(AMPLIFIERS : MODULATOR-DEMODULATOR-TYPE AMPLIFIER : Phonon type (e.g., ultrasonic wave propagating device))

Patent 5521550: Digital circuitry for noise blanking
(AMPLIFIERS : MODULATOR-DEMODULATOR-TYPE AMPLIFIER : Phonon type (e.g., ultrasonic wave propagating device))

Patent 5521551: Method for suppressing second and higher harmonic power generation in klystrons
(AMPLIFIERS : WITH ELECTRON BEAM TUBE AMPLIFYING DEVICE : Having electrode coupled to cavity resonator : Having different configurations)

Patent 5521552: Bipolar micro-power rail-to-rail amplifier
(AMPLIFIERS : WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) : Including differential amplifier : Having current mirror amplifier :)

Patent 5521553: Method for controlling an output stage of a bipolar micro-power rail-to-rail amplifier
(AMPLIFIERS : WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) : Including push-pull amplifier : Having complementary symmetry : And feedback means :)

Patent 5521554: High-frequency band amplifier system
(AMPLIFIERS : WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) : Including frequency-responsive means in the signal transmission path : And bandpass, broadband (e.g., wideband) or sidepass means : Having emitter degeneration)

Patent 5521555: Ultra low noise optical receiver
(AMPLIFIERS : WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) : Including atomic particle or radiant energy impinging on a semiconductor : And bandpass, broadband (e.g., wideband) or sidepass means)

Patent 5521556: Frequency converter utilizing a feedback control loop
(OSCILLATORS : AUTOMATIC FREQUENCY STABILIZATION USING A PHASE OR FREQUENCY SENSING MEANS :)

Patent 5521557: Delay detection circuit and low-noise oscillation circuit using the same
(OSCILLATORS : AUTOMATIC FREQUENCY STABILIZATION USING A PHASE OR FREQUENCY SENSING MEANS : Plural A.F.S. for a single oscillator : Plural comparators or discriminators :)

Patent 5521558: Inverter stage having diode load and ring oscillator using same
(OSCILLATORS : RING OSCILLATORS : Parallel connected)

Patent 5521559: Signal oscillator, FM modulation circuit using the same, and FM modulation method
(MODULATORS : FREQUENCY MODULATOR : Pulse amplitude modulator)

Patent 5521560: Minimum phase shift microwave attenuator
(WAVE TRANSMISSION LINES AND NETWORKS : ATTENUATORS : Coaxial or microstrip : Providing negative resistance)

Patent 5521561: Arrangement for separating transmission and reception
(WAVE TRANSMISSION LINES AND NETWORKS : PLURAL CHANNEL SYSTEMS : Having branched circuits : Including switching means : Having semiconductor operating means :)

Patent 5521562: High isolation switch
(WAVE TRANSMISSION LINES AND NETWORKS : PLURAL CHANNEL SYSTEMS : Having branched circuits : Including switching means : Having semiconductor operating means : Using TEM lines :)

Patent 5521563: Microwave hybrid coupler
(WAVE TRANSMISSION LINES AND NETWORKS : PLURAL CHANNEL SYSTEMS : Having branched circuits : Using directional coupler : Having TEM lines : Using stripline : For TEM lines)

Patent 5521564: Resonator and chip-type filter using it
(WAVE TRANSMISSION LINES AND NETWORKS : COUPLING NETWORKS : Frequency domain filters utilizing only lumped parameters : Resonant, discrete frequency selective type : With variable response)

Patent 5521565: Surface wave interdigital transducer and surface wave filter with symmetric or predeterminable asymmetric transfer characteristic between
(WAVE TRANSMISSION LINES AND NETWORKS : COUPLING NETWORKS : Electromechanical filter : Using surface acoustic waves : With wave-modifying means (e.g., reflectors, resonators, diffractors, multistrip couplers, etc.) : Monolithic structure)

Patent 5521566: High amperage solenoid structure
(ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS : ELECTROMAGNETICALLY ACTUATED SWITCHES : Multiple contact type : Contacts-selectively, sequentially, alternately, or intermittently actuated : Contact-actuation means : Reciprocating or linearly sliding : Rotary armature)

Patent 5521567: Switchgear module and configurations, and method of fabrication and assembly thereof
(ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS : ELECTROMAGNETICALLY ACTUATED SWITCHES : Multiple contact type : With adjustable, replaceable or interchangeable structural features : By reciprocating armature)

Patent 5521568: Electrical delay line
(WAVE TRANSMISSION LINES AND NETWORKS : COUPLING NETWORKS : Delay lines including a lumped parameter : Physical structure : Using waveguide)

Patent 5521569: Hyper-rapid circuit breaker
(ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS : ELECTROMAGNETICALLY ACTUATED SWITCHES : Electrodynamically actuated : Thermomagnetic (e.g., device whose magnetic permeability changes with temperature))

Patent 5521570: Superconductive magnetic levitation apparatus
(ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS : MAGNETS AND ELECTROMAGNETS : Superconductive type : With coil structure)

Patent 5521571: Open MRI magnet with uniform imaging volume
(ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS : MAGNETS AND ELECTROMAGNETS : Superconductive type : With coil structure)

Patent 5521572: Unshielded air-coupled current transformer
(INDUCTOR DEVICES : WITH CLOSED CORE INTERRUPTED BY AN AIR GAP : Hinged core)

Patent 5521573: Printed coil
(INDUCTOR DEVICES : WINDING FORMED OF PLURAL COILS (SERIES OR PARALLEL) : Hinged core)

Patent 5521574: Coil for an electromagnetic relay
(INDUCTOR DEVICES : WINDING WITH TERMINALS, TAPS, OR COIL CONDUCTOR END ANCHORING MEANS : Basket weave (single layer))

Patent 5521575: Key signal input circuit for microcomputer
(CODED DATA GENERATION OR CONVERSION : BODILY ACTUATED CODE GENERATOR : Including keyboard or keypad : With particular key scanning feature : With rollover feature (i.e., antidoublestrike))

Patent 5521576: Fine-line thick film resistors and resistor networks and method of making same
(ELECTRICAL RESISTORS : WITH BASE EXTENDING ALONG RESISTANCE ELEMENT : Resistance element and/or terminals printed or marked on base : Element extends in or through openings or grooves in frame or support)

Patent 5521577: Low profile resistor
(ELECTRICAL RESISTORS : WITH BASE EXTENDING ALONG RESISTANCE ELEMENT : Terminal extends in or through base : Terminal coated on)

Patent 5521578: Display and control device for homes, apartments, and other buildings
(COMMUNICATIONS: ELECTRICAL : SYSTEMS : In and out indicators (e.g., doorbell button flashes "out" sign) : Intermittent)

Patent 5521579: Method for providing guiding assistance for a vehicle in changing lane
(COMMUNICATIONS: ELECTRICAL : LAND VEHICLE ALARMS OR INDICATORS : Internal alarm or indicator responsive to a condition of the vehicle : Curb)

Patent 5521580: Danger avoidance system for a vehicle
(COMMUNICATIONS: ELECTRICAL : LAND VEHICLE ALARMS OR INDICATORS : Internal alarm or indicator responsive to a condition of the vehicle : Operation efficiency (e.g., engine performance, driver habits) : Accessory (e.g., speaker, radio face plate, etc.))

Patent 5521581: Fluid level and temperature monitor and alarm system for an automobile cooling system
(COMMUNICATIONS: ELECTRICAL : LAND VEHICLE ALARMS OR INDICATORS : Internal alarm or indicator responsive to a condition of the vehicle : Temperature : With particular telemetric coupling)

Patent 5521582: Alarm system
(COMMUNICATIONS: ELECTRICAL : CONDITION RESPONSIVE INDICATING SYSTEM : With particular coupling link : Radio : Including personal portable device : Mechanical code means (e.g., coded disc))

Patent 5521583: Metal detection system
(COMMUNICATIONS: ELECTRICAL : CONDITION RESPONSIVE INDICATING SYSTEM : Specific condition : Intrusion detection : Disturbance of magnetic field : Plural doors or windows)

Patent 5521584: Apparatus and method for detecting ice
(COMMUNICATIONS: ELECTRICAL : CONDITION RESPONSIVE INDICATING SYSTEM : Specific condition : Ice formation : Thermal : Specified device housing or attachment means)

Patent 5521585: Protector
(COMMUNICATIONS: ELECTRICAL : CONDITION RESPONSIVE INDICATING SYSTEM : Specific condition : Fluent material : Particle suspension in fluid : Smoke : Float sensor)

Patent 5521586: Electronic apparatus
(COMMUNICATIONS: ELECTRICAL : CONDITION RESPONSIVE INDICATING SYSTEM : Specific condition : Condition of electrical apparatus : Gas)

Patent 5521587: Light-emitting diode indicator and display panel using the same
(COMMUNICATIONS: ELECTRICAL : VISUAL INDICATION : Using light emitting diodes : With specified colors)

Patent 5521588: Method and apparatus for programming motor vehicle controls
(COMMUNICATIONS: ELECTRICAL : SELECTIVE : Program control : With addressing)

Patent 5521589: Method and apparatus for receiving and selectively announcing time-activated messages
(COMMUNICATIONS: ELECTRICAL : SELECTIVE : Having indication or alarm (e.g., location indication) : Code responsive (i.e., paging) : Message presentation : Tone code (i.e., frequency code))

Patent 5521590: Data carrier
(COMMUNICATIONS: ELECTRICAL : SELECTIVE : Interrogation response : Additional control : Programming (e.g., read/write) : Audible)

Patent 5521591: Switching networks with expansive and/or dispersive logical clusters for message routing
(COMMUNICATIONS: ELECTRICAL : SELECTIVE : Path selection : Channel selecting matrix : Plural stages : Conveyor belt)

Patent 5521592: Method and apparatus for transmitting information relating to the operation of a downhole electrical device
(COMMUNICATIONS: ELECTRICAL : WELLBORE TELEMETERING OR CONTROL (E.G., SUBSURFACE TOOL GUIDANCE, DATA TRANSFER, ETC.) : Using a specific transmission medium (e.g., conductive fluid, annular spacing, etc.) : Electromagnetic energy (e.g., radio frequency, etc.) : Near field coupling (e.g., inductive, capacitive, etc.) :)

Patent 5521593: Method and apparatus for monitoring operating characteristics of semiconductor electric power switching circuits
(COMMUNICATIONS: ELECTRICAL : CONTINUOUSLY VARIABLE INDICATING (E.G., TELEMETERING) : Condition responsive : Temperature : Using particular sync)

Patent 5521594: Road surface condition detector for automotive vehicle
(COMMUNICATIONS: ELECTRICAL : EXTERNAL CONDITION VEHICLE-MOUNTED INDICATOR OR ALARM : With particular receiver (e.g., ratiometer))

Patent 5521595: Illuminated hazard warning device
(COMMUNICATIONS: ELECTRICAL : TRAFFIC CONTROL INDICATOR : Portable : Relative distence between vehicles (e.g., collision alert))

Patent 5521596: Analog input device located in the primary typing area of a keyboard
(CODED DATA GENERATION OR CONVERSION : BODILY ACTUATED CODE GENERATOR : Including keyboard or keypad : Having optical waveguide)

Patent 5521597: Data compression for network transport
(CODED DATA GENERATION OR CONVERSION : DIGITAL CODE TO DIGITAL CODE CONVERTERS : Adaptive coding : Pressure sensitive actuation)

Patent 5521598: RLL/NRZ decoder programmable for single/dual bit output data streams
(CODED DATA GENERATION OR CONVERSION : DIGITAL CODE TO DIGITAL CODE CONVERTERS : To or from run length limited codes : Binary to or from ternary)

Patent 5521599: High speed analog signal sampling system
(CODED DATA GENERATION OR CONVERSION : SAMPLE AND HOLD : Trimming control circuits)

Patent 5521600: Range-gated field disturbance sensor with range-sensitivity compensation
(COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION) : PRESENCE DETECTION ONLY : Ground based (EPO))

Patent 5521601: Power-efficient technique for multiple tag discrimination
(COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION) : RADAR TRANSPONDER SYSTEM : Unique identity : With defruiting or degarbling)

Patent 5521602: Communications system utilizing FSK/PSK modulation techniques
(COMMUNICATIONS: ELECTRICAL : SELECTIVE : Interrogation response : Response signal detail : Combination response : Audible)

Patent 5521603: Incipient lightning detection and device protection
(COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION) : WITH PARTICULAR CIRCUIT : For receiver protection : With video quantizer)

Patent 5521604: Tracking system for vehicle-mounted antenna
(COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION) : DIRECTIVE : Including antenna orientation : With satellite signal correction)

Patent 5521605: Extendable antenna for a radio transceiver
(COMMUNICATIONS: RADIO WAVE ANTENNAS : ANTENNAS : With radio cabinet :)

Patent 5521606: Window glass antenna for motor vehicles
(COMMUNICATIONS: RADIO WAVE ANTENNAS : ANTENNAS : With vehicle : Supported by vehicle body :)

Patent 5521607: Bandswitched electrically short tactical monopole antenna system
(COMMUNICATIONS: RADIO WAVE ANTENNAS : ANTENNAS : With variable reactance for tuning antenna : With series reactance in loop)

Patent 5521608: Multibay coplanar direction finding antenna
(COMMUNICATIONS: RADIO WAVE ANTENNAS : ANTENNAS : With lumped reactance for loading antenna : Loop type)

Patent 5521609: Magnetic antenna using metallic glass
(COMMUNICATIONS: RADIO WAVE ANTENNAS : ANTENNAS : Including magnetic material : Loop type : With main and subreflector (Casse-grain type))

Patent 5521610: Curved dipole antenna with center-post amplifier
(COMMUNICATIONS: RADIO WAVE ANTENNAS : ANTENNAS : Balanced doublet - centerfed (e.g., dipole) : Plural crossed (e.g., turnstile) : With main and subreflector (Casse-grain type))

Patent 5521611: Driving circuit for a display apparatus
(COMPUTER GRAPHICS PROCESSING AND SELECTIVE VISUAL DISPLAY SYSTEMS : PLURAL PHYSICAL DISPLAY ELEMENT CONTROL SYSTEM (E.G., NON-CRT) : Display elements arranged in matrix (e.g., rows and columns) : Light-controlling display elements : Liquid crystal display elements (LCD) : Gray scale capability (e.g., halftone) : Including transformer)

Patent 5521612: Method and device for reduction of electric field radiation from a liquid crystal display unit
(COMPUTER GRAPHICS PROCESSING AND SELECTIVE VISUAL DISPLAY SYSTEMS : PLURAL PHYSICAL DISPLAY ELEMENT CONTROL SYSTEM (E.G., NON-CRT) : Display elements arranged in matrix (e.g., rows and columns) : Light-controlling display elements : Liquid crystal display elements (LCD) : Backlight control : Particular row or column control (e.g., shift register))

Patent 5521613: Display controller
(COMPUTER GRAPHICS PROCESSING AND SELECTIVE VISUAL DISPLAY SYSTEMS : COMPUTER GRAPHICS DISPLAY MEMORY SYSTEM : Logical operations : Mask data operation : Multiple planes)

Patent 5521614: Method and apparatus for expanding and centering VGA text and graphics
(COMPUTER GRAPHICS PROCESSING AND SELECTIVE VISUAL DISPLAY SYSTEMS : COMPUTER GRAPHICS PROCESSING : Character generating : Alteration of stored font : Scaling : Enlargement only : Attribute changes during scrolling)

Patent 5521615: Display system for instruments
(COMPUTER GRAPHICS PROCESSING AND SELECTIVE VISUAL DISPLAY SYSTEMS : COMPUTER GRAPHICS PROCESSING : Attributes (surface detail or characteristic, display attributes) : Color or intensity : Color selection : Using GUI :)

Patent 5521616: Control interface apparatus
(COMPUTER GRAPHICS PROCESSING AND SELECTIVE VISUAL DISPLAY SYSTEMS : DISPLAY PERIPHERAL INTERFACE INPUT DEVICE : Animation)

Patent 5521617: Three-dimensional image special effect apparatus
(COMPUTER GRAPHICS PROCESSING AND SELECTIVE VISUAL DISPLAY SYSTEMS : DISPLAY PERIPHERAL INTERFACE INPUT DEVICE : Cursor mark position control device : Trackball : Optical detector)

Patent 5521618: Dual element switched digital drive system for an ink jet printhead
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : INK JET : Controller : Of ejector : Drive waveform :)

Patent 5521619: Ink jet type recording apparatus that controls into meniscus vibrations
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : INK JET : Controller : Of ejector : Drive waveform :)

Patent 5521620: Correction circuit for an ink jet device to maintain print quality
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : INK JET : Controller : Of ejector : Responsive to condition : Full-line array)

Patent 5521621: Bubble jet recording apparatus with processing circuit for tone gradation recording
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : INK JET : Controller : Of ejector : Creating plural tones : Full-line array)

Patent 5521622: Print quality optimization for a color ink-jet printer by using a larger nozzle for the black ink only
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : INK JET : Ejector mechanism (i.e., print head) : Array of ejectors : Color type : Movement)

Patent 5521623: Printing method and apparatus
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : INK JET : Ejector mechanism (i.e., print head) : Continuous stream (includes dispersion) : With individual drop generation and/or control : Layers, plates)

Patent 5521624: Thin type of ink jet cartridge
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : INK JET : Fluid or fluid source handling means : Fluid supply system : Cartridge : With integral ejector : Drop sensors)

Patent 5521625: Propagation-delay-transparent video-signal interface
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : INK JET : Housing : With unique pattern)

Patent 5521626: Fusion-type thermal transfer printing system
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : THERMAL MARKING APPARATUS OR PROCESSES : Gradational recording : Sequentially)

Patent 5521627: Thermal printer
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : THERMAL MARKING APPARATUS OR PROCESSES : Platen or engaging means therefor : Including tensioning means)

Patent 5521628: Laser system for simultaneously marking multiple parts
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : LIGHT OR BEAM MARKING APPARATUS OR PROCESSES : Scan of light : Plural beam scan : Specific optical structure : Including deflector : For detecting color)

Patent 5521629: Method and apparatus for laser dye ablation printing with high intensity laser diode
(INCREMENTAL PRINTING OF SYMBOLIC INFORMATION : LIGHT OR BEAM MARKING APPARATUS OR PROCESSES : Scan of light : With record receiver or handling means therefor : Having deflector)

Patent 5521630: Frame sampling scheme for video scanning in a video-on-demand system
(INTERACTIVE VIDEO DISTRIBUTION SYSTEMS : USER-REQUESTED VIDEO PROGRAM SYSTEM : Video-on-demand : VCR-like function : With particular transmission scheme (e.g., transmitting I-frames only) : Combined at local receiver)

Patent 5521631: Interactive digital video services system with store and forward capabilities
(INTERACTIVE VIDEO DISTRIBUTION SYSTEMS : LOCAL VIDEO DISTRIBUTION SYSTEM : Multiunit or multiroom structure (e.g., home, hospital, hotel, office building, school, etc.) : Airplane)

Patent 5521632: Adaptor for use in video microscope systems
(TELEVISION : SPECIAL APPLICATIONS : Microscope : Eye)

Patent 5521633: Motor vehicle obstacle monitoring system using optical flow processing
(TELEVISION : SPECIAL APPLICATIONS : Navigation : Land vehicle : Color TV)

Patent 5521634: Automatic detection and prioritized image transmission system and method
(TELEVISION : OBJECT TRACKING : Infrared)

Patent 5521635: Voice filter system for a video camera
(TELEVISION : CAMERA, SYSTEM AND DETAIL : Combined image signal generator and general image signal processing : With details of static memory for output image (e.g., for a still camera) : Storage of additional data : Audio :)

Patent 5521636: Horizontal line interpolation circuit and image pickup apparatus including it
(TELEVISION : CAMERA, SYSTEM AND DETAIL : Combined image signal generator and general image signal processing : Exposure control)

Patent 5521637: Solid state image pick-up apparatus for converting the data clock rate of the generated picture data signals
(TELEVISION : CAMERA, SYSTEM AND DETAIL : Combined image signal generator and general image signal processing : Exposure control)

Patent 5521638: Video camera with record shutoff mechanism
(TELEVISION : CAMERA, SYSTEM AND DETAIL : Camera image stabilization : Combined with other camera operations (e.g., autofocus or autoexposure details) : Changing camera function based on motion detection (mode, power supply) : Optics, lens shifting)

Patent 5521639: Solid-state imaging apparatus including a reference pixel in the optically-black region
(TELEVISION : CAMERA, SYSTEM AND DETAIL : Combined image signal generator and general image signal processing : Including noise or undesired signal reduction : Dark current : For single sensor type camera supplying plural color signals)

Patent 5521640: Color image array scanner with high resolution monochrome mode
(TELEVISION : CAMERA, SYSTEM AND DETAIL : With single image scanning device supplying plural color signals : Solid-state multicolor image sensor : With color filter or operation according to color filter : Four or more color types)

Patent 5521641: Image data coding apparatus and method
(TELEVISION : BANDWIDTH REDUCTION SYSTEM : Data rate reduction : Involving hybrid transform and difference coding : With prior difference coding : Transform coding)

Patent 5521642: Decoding system for compact high definition television receivers
(PULSE OR DIGITAL COMMUNICATIONS : BANDWIDTH REDUCTION OR EXPANSION : Television or motion video signal : Predictive : Motion vector : Subband coding)

Patent 5521643: Adaptively coding method and apparatus utilizing variation in quantization step size
(PULSE OR DIGITAL COMMUNICATIONS : BANDWIDTH REDUCTION OR EXPANSION : Television or motion video signal : Adaptive : Quantization : Feed back :)

Patent 5521644: Mechanism for controllably deinterlacing sequential lines of video data field based upon pixel signals associated with four successive
(TELEVISION : FORMAT CONVERSION : Line doublers type (e.g., interlace to progressive IDTV type) : Motion adaptive : Motion adaptive)

Patent 5521645: Multistandard video signal decoder
(TELEVISION : NONPICTORIAL DATA PACKET IN TELEVISION FORMAT : Data separation or detection : Frequency change of subcarrier)

Patent 5521646: Geometry and convergence correction for projection television apparatus
(TELEVISION : VIDEO DISPLAY : Projection device : With moving color filters)

Patent 5521647: Integrated circuit device for processing image signal
(TELEVISION : IMAGE SIGNAL PROCESSING CIRCUITRY SPECIFIC TO TELEVISION : For display of additional information)

Patent 5521648: Image transforming apparatus to provide special effects
(TELEVISION : IMAGE SIGNAL PROCESSING CIRCUITRY SPECIFIC TO TELEVISION : Special effects : Geometric transformation : Tuning indication)

Patent 5521649: Transmitting device of a predetermined transmission bandwidth, with an anti-distortion device connected downstream
(TELEVISION : IMAGE SIGNAL PROCESSING CIRCUITRY SPECIFIC TO TELEVISION : Transition or edge sharpeners : For color television)

Patent 5521650: Cable television tuner
(TELEVISION : RECEIVER CIRCUITRY : Tuning : Color television)

Patent 5521651: Automatic fine tuning detection circuit
(TELEVISION : RECEIVER CIRCUITRY : Tuning : Color television)

Patent 5521652: Proximity controlled safety device for a video monitor
(TELEVISION : VIDEO DISPLAY : Cathode-ray tube : Protective device : Radiation protection for user : Electrochromic device)

Patent 5521653: Vision restricting sports training glasses
(OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING : SPECTACLES AND EYEGLASSES : With antiglare or shading : Partially occluding the light-path area : Having support or cabinet)

Patent 5521654: Combination extended natural eyeglasses and corrective eye magnifier
(OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING : SPECTACLES AND EYEGLASSES : With antiglare or shading : Perforated opaque plates or shields : Having support or cabinet)

Patent 5521655: Camouflage eyewear
(OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING : SPECTACLES AND EYEGLASSES : With decoration or ornamentation : Polarizing)

Patent 5521656: Method of making an ophthalmic lens
(OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING : SPECTACLES AND EYEGLASSES : Ophtahalmic lenses or blanks : Methods : Multiple elements)

Patent 5521657: Method and system for topographic measurement by measuring the distance between a rigid reference member and a surface of an eye
(OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING : EYE EXAMINING OR TESTING INSTRUMENT : Objective type : Including projected target image : For cornea curvature measurement :)

Patent 5521658: Optical aspect ratio control for video projection
(OPTICS: IMAGE PROJECTORS : REFLECTOR : And lens support)

Patent 5521659: Rear projection display apparatus
(OPTICS: IMAGE PROJECTORS : HOUSING : Slides gripped or hooked)

Patent 5521660: Multimedia field emission device portable projector
(OPTICS: IMAGE PROJECTORS : MISCELLANEOUS : Slides gripped or hooked)

Patent 5521661: Camera having means for indicating whether a film cartridge is loaded into or unloaded from a cartridge chamber
(PHOTOGRAPHY : CAMERA DETAIL : Body structure or housing : Film chamber detail : Having viewing port)

Patent 5521662: Film viewer
(PHOTOGRAPHY : CAMERA COMBINED WITH OR CONVERTIBLE TO DIVERSE ART DEVICE : Adjustable support)

Patent 5521663: Sound system for still film photography
(PHOTOGRAPHY : WITH DATA RECORDING : Sound : Images recorded on separate films)

Patent 5521664: Camera with flash-prevention mode override
(PHOTOGRAPHY : WITH OBJECT ILLUMINATION FOR EXPOSURE : Activated under low light condition : Having indicator)

Patent 5521665: Composite image camera with flash device
(PHOTOGRAPHY : WITH DATA RECORDING : Optical : Having transfer strip)

Patent 5521666: Perforation detector of a camera
(PHOTOGRAPHY : WITH FILM DRIVE : Film movement limiting means : From film itself : Base guide)

Patent 5521667: Camera utilizing a push-out type film cartridge
(PHOTOGRAPHY : WITH FILM DRIVE : Having significant electronic circuit detail : Prewind : Having film transport mechanism locked by perforation sensing pawl)

Patent 5521668: Film guide mechanism of camera
(PHOTOGRAPHY : CAMERA DETAIL : Film restraining means or pressure plate : Having release actuator on support)

Patent 5521669: Frame positioning and shutter cocking mechanism
(PHOTOGRAPHY : WITH FILM DRIVE : Film transport cocks shutter : From film itself)

Patent 5521670: Camera utilizing horizontal and vertical board connectors
(PHOTOGRAPHY : CAMERA DETAIL : Having printed circuit detail : Modular body)

Patent 5521671: Camera display apparatus having rotating elements to indicate photographic information
(PHOTOGRAPHY : HAVING CAMERA INDICATOR : Having indicator)

Patent 5521672: Automatic focusing device
(PHOTOGRAPHY : WITH EXPOSURE OBJECTIVE FOCUSING MEANS, FOCUSING AID, OR RANGEFINDING MEANS : Having pursuit mode : With mechanical rangefinder)

Patent 5521673: Photometric apparatus of a camera
(PHOTOGRAPHY : EXPOSURE CONTROL CIRCUIT : Having plural photocells : More than two photometering areas : Indicating power source status)

Patent 5521674: System and method for controlling a printer device
(ELECTROPHOTOGRAPHY : CONTROL OF ELECTROPHOTOGRAPHY PROCESS : Control of transfer : Concentration control)

Patent 5521675: Annotation system occluding device for an electrophotographic printing apparatus
(ELECTROPHOTOGRAPHY : COMBINED WITH DIVERSE SUBJECT MATTER :)

Patent 5521676: Method and apparatus for controlling the temperature of a fixing device in an image forming apparatus depending on a paper feed path or method
(ELECTROPHOTOGRAPHY : CONTROL OF ELECTROPHOTOGRAPHY PROCESS : Control of fixing : Temperature control : Detection of toner in developing unit)

Patent 5521677: Method for solid area process control for scavengeless development in a xerographic apparatus
(ELECTROPHOTOGRAPHY : CONTROL OF ELECTROPHOTOGRAPHY PROCESS : Control of developing : Concentration control : Setting of reference value : On or adjacent to platen)

Patent 5521678: Electrostatographic imaging drum having a periphery flush with periphery of an end cap
(ELECTROPHOTOGRAPHY : IMAGE FORMATION : Photoconductive member : To produce outline image)

Patent 5521679: Image forming apparatus having clamp for conveying a recording medium
(ELECTROPHOTOGRAPHY : IMAGE FORMATION : Transfer : Electrostatic : To produce duplex)

Patent 5521680: Printer having a self-aligning charging device
(ELECTROPHOTOGRAPHY : IMAGE FORMATION : Transfer : Electrostatic : Corona : Having gripper)

Patent 5521681: Image forming apparatus
(ELECTROPHOTOGRAPHY : INTERNAL MACHINE ENVIRONMENT : Particle or contaminant control : Seal : Transfer member)

Patent 5521683: Image forming apparatus using constant voltage or constant current AC signal applied to developer bearing member, and control function in
(ELECTROPHOTOGRAPHY : CONTROL OF ELECTROPHOTOGRAPHY PROCESS : Control of developing : Bias control : By concentration detector)

Patent 5521684: Image forming apparatus including optical element for optically detecting amount of developing agent in developer
(ELECTROPHOTOGRAPHY : CONTROL OF ELECTROPHOTOGRAPHY PROCESS : Control of developing : Concentration control : Detection of toner in developing unit : Concentration detection : Optical detector :)

Patent 5521685: Foam roller cleaning system for a liquid electrophotographic printer
(ELECTROPHOTOGRAPHY : IMAGE FORMATION : Development : Liquid development : Removing excess developer (e.g., squeegee) : Fountain)

Patent 5521686: Electrophotographic image forming method and apparatus wherein image fixing heater temperature is controllable
(ELECTROPHOTOGRAPHY : CONTROL OF ELECTROPHOTOGRAPHY PROCESS : Control of fixing : Temperature control : Detection of toner in developing unit)

Patent 5521687: Method of removing impurities from a transport member during an electrostatic imaging process
(ELECTROPHOTOGRAPHY : IMAGE FORMATION : Transfer : By intermediate transfer member : Copy medium carrier (e.g., drum or belt))

Patent 5521688: Hybrid color fuser
(ELECTROPHOTOGRAPHY : IMAGE FORMATION : Fixing (e.g., fusing) : Color : Having copy medium guide)

Patent 5521689: Image forming apparatus with flash fixing
(ELECTROPHOTOGRAPHY : IMAGE FORMATION : Fixing (e.g., fusing) : By heat : Radiant, infrared, or microwave : Axial heat distribution)

Patent 5521690: Pneumatic toner transport device for an electrographic printing or copying machine
(ELECTROPHOTOGRAPHY : INTERNAL MACHINE ENVIRONMENT : Forced air circulation : Having filtering (e.g., ozone removal) : Having priority interrupt)

Patent 5521691: Cleaning device for removing residual toner on an image carrier
(ELECTROPHOTOGRAPHY : CLEANING OF IMAGING SURFACE : Blade : Having treatment of image)

Patent 5521692: Method and apparatus for identifying substrate surface relief and controlling print quality
(ELECTROPHOTOGRAPHY : DIAGNOSTICS : Consumable : Photoconductive member : Misstrip of copy)

Patent 5521693: Image forming apparatus and process cartridge detachably mountable to same
(ELECTROPHOTOGRAPHY : IMAGE FORMATION : Development : Plural diverse (e.g., color) : Selectively active : Rotary type)

Patent 5521694: Laser beam path profile sensor system
(OPTICS: MEASURING AND TESTING : RANGE OR REMOTE DISTANCE FINDING : Triangulation ranging to a point with one projected beam : Using a source beam with a fixed axial direction or plane : With at least one paired set of staring photodetectors : Having electronic scanning of the photodetector)

Patent 5521695: Range estimation apparatus and method
(OPTICS: MEASURING AND TESTING : RANGE OR REMOTE DISTANCE FINDING : With photodetection : Using at least a pair of viewing axes)

Patent 5521696: Laser-based speed measuring device
(OPTICS: MEASURING AND TESTING : RANGE OR REMOTE DISTANCE FINDING : With photodetection : Of pulse transit time : Having pulse transmission trigger significance : Including optical pick-off of transmission start : With specific counter type timing of returns :)

Patent 5521697: Protective cover for fiberoptic scanner head
(OPTICS: MEASURING AND TESTING : OPTICAL PYROMETERS : With sample engaging rod or tube : Standards)

Patent 5521698: Analysis system
(OPTICS: MEASURING AND TESTING : OIL TESTING (E.G., CONTAMINATION) : Lamp attachments)

Patent 5521699: Imaging flow cytometer and imaging method having plural optical paths of different magnification power
(OPTICS: MEASURING AND TESTING : PLURAL TEST : Lamp attachments)

Patent 5521700: Meter for testing progressive multifocus lenses
(OPTICS: MEASURING AND TESTING : LENS OR REFLECTIVE IMAGE FORMER TESTING : With lamp focusing)

Patent 5521701: Optical power meter
(OPTICS: MEASURING AND TESTING : PHOTOMETERS : Photoelectric : With scanning, sweeping, or moving detector over film)

Patent 5521702: Reusable biocompatible interface for immobilization of materials on a solid support
(OPTICS: MEASURING AND TESTING : SAMPLE, SPECIMEN, OR STANDARD HOLDER OR SUPPORT (E.G., PLATES OR SLIDES) : Surface standard)

Patent 5521703: Diode laser pumped Raman gas analysis system with reflective hollow tube gas cell
(OPTICS: MEASURING AND TESTING : BY DISPERSED LIGHT SPECTROSCOPY : With Raman type light scattering : With particular illumination means)

Patent 5521704: Apparatus and method for measuring absolute measurements having two measuring interferometers and a tunable laser
(OPTICS: MEASURING AND TESTING : BY LIGHT INTERFERENCE (E.G., INTERFEROMETER) : Having light beams of different frequencies (e.g., heterodyning) : For dimensional measurement (e.g., thickness gap, alignment, profile) : Displacement or distance : Including an alternating reference path)

Patent 5521705: Polarized light microscopy
(OPTICS: MEASURING AND TESTING : BY POLARIZED LIGHT EXAMINATION : With polariscopes : Including polarimeters : With electro-optical light rotation : Of transmission (e.g., lens))

Patent 5521706: System and method for compensating polarization-dependent sensitivity of dispersive optics in a rotating analyzer ellipsometer system
(OPTICS: MEASURING AND TESTING : BY POLARIZED LIGHT EXAMINATION : Of surface reflection : Including polarimeters)

Patent 5521707: Laser scanning method and apparatus for rapid precision measurement of thread form
(OPTICS: MEASURING AND TESTING : BY CONFIGURATION COMPARISON : With comparison to master, desired shape, or reference voltage : For comparison with master or desired configuration)

Patent 5521708: Correlated color temperature detector
(OPTICS: MEASURING AND TESTING : BY SHADE OR COLOR : With registration indicia (e.g., scale))

Patent 5521709: Continuous barcode marking system
(FACSIMILE AND STATIC PRESENTATION PROCESSING : FACSIMILE : Recording apparatus : Scanning)

Patent 5521710: Method of applying electronically stored labels from a source job to a destination job in a printing system
(FACSIMILE AND STATIC PRESENTATION PROCESSING : FACSIMILE : Recording apparatus : Scanning)

Patent 5521711: Information processing apparatus, and method of reversing color therein
(FACSIMILE AND STATIC PRESENTATION PROCESSING : FACSIMILE : Recording apparatus : Electrostatic or electrolytic : Document feed)

Patent 5521712: Teletext signal recording and reproducing apparatus
(TELEVISION SIGNAL PROCESSING FOR DYNAMIC RECORDING OR REPRODUCING : PROCESSING OF TELEVISION SIGNAL FOR DYNAMIC RECORDING OR REPRODUCING : Having another signal : Digital technique)

Patent 5521713: Apparatus and method for data compression and expansion using hybrid equal length coding and unequal length coding
(TELEVISION SIGNAL PROCESSING FOR DYNAMIC RECORDING OR REPRODUCING : PROCESSING OF TELEVISION SIGNAL FOR DYNAMIC RECORDING OR REPRODUCING : Compressing in recording or decompressing in reproducing : Digital compressing : Including television camera)

Patent 5521714: Rotary head type reproducing apparatus
(TELEVISION SIGNAL PROCESSING FOR DYNAMIC RECORDING OR REPRODUCING : PROCESSING OF TELEVISION SIGNAL FOR DYNAMIC RECORDING OR REPRODUCING : Time (e.g., phase or frequency) correction : Of relative transducer/record medium speed : Using control signal on the recording medium)

Patent 5521715: Device and method for reproducing digital image data
(FACSIMILE AND STATIC PRESENTATION PROCESSING : FACSIMILE : Image reproduction system : Composite image)

Patent 5521716: Data storage device having a selective voice and image data erasing function
(FACSIMILE AND STATIC PRESENTATION PROCESSING : FACSIMILE : Electronic mailbox : Composite image)

Patent 5521717: Image processing apparatus and method therefor
(IMAGE ANALYSIS : IMAGE COMPRESSION OR CODING : Pyramid, hierarchy, or tree structure : Checking spelling for recognition)

Patent 5521718: Efficient iterative decompression of standard ADCT-compressed images
(IMAGE ANALYSIS : IMAGE COMPRESSION OR CODING : Including details of decompression : Checking spelling for recognition)

Patent 5521719: Communication apparatus having improved group 3 facsimile subaddress communication function
(FACSIMILE AND STATIC PRESENTATION PROCESSING : FACSIMILE : Auxiliary signal : Transmitter supplies auxiliary signal(s) : Auxiliary signal controls apparatus at both transmitter and receiver)

Patent 5521720: Image processing apparatus for changing the resolution upon rotation of the image
(FACSIMILE AND STATIC PRESENTATION PROCESSING : FACSIMILE : Specific signal processing circuitry : Image processing : Auxiliary signal controls apparatus at both transmitter and receiver)

Patent 5521721: Superimposition of images in a digital copier or printer
(FACSIMILE AND STATIC PRESENTATION PROCESSING : STATIC PRESENTATION PROCESSING (E.G., PROCESSING DATA FOR PRINTER, ETC.) : Attribute control : Processing based on at least two different image attributes (e.g., character, graphic, photo, line, edge, gray-level, color) :)

Patent 5521722: Image handling facilitating computer aided design and manufacture of documents
(FACSIMILE AND STATIC PRESENTATION PROCESSING : NATURAL COLOR FACSIMILE : Detail of image placement or content)

Patent 5521723: System for producing a color hardcopy having the color and the tone reproduction characteristics of a photograph
(FACSIMILE AND STATIC PRESENTATION PROCESSING : NATURAL COLOR FACSIMILE : Image reproduction : Page or frame memory)

Patent 5521724: Real-time automultiscopic 3D video display using holographic optical elements (HOEs)
(OPTICAL: SYSTEMS AND ELEMENTS : HOLOGRAPHIC SYSTEM OR ELEMENT : For producing or reconstructing images from multiple holograms (e.g., color, etc.) : Lens)

Patent 5521725: Illumination system employing an array of microprisms
(LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS : PARTICULAR STRUCTURE : Having significant detail of cell structure only : Microlenses : Formed by particular technique)

Patent 5521726: Polarizer with an array of tapered waveguides
(LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS : PARTICULAR STRUCTURE : Having significant detail of cell structure only : Polarizer : Formed by particular technique)

Patent 5521727: Method and apparatus for driving liquid crystal device whereby a single period of data signal is divided into plural pulses of varying pulse
(COMPUTER GRAPHICS PROCESSING AND SELECTIVE VISUAL DISPLAY SYSTEMS : PLURAL PHYSICAL DISPLAY ELEMENT CONTROL SYSTEM (E.G., NON-CRT) : Display elements arranged in matrix (e.g., rows and columns) : Light-controlling display elements : Liquid crystal display elements (LCD) : Gray scale capability (e.g., halftone) : Including transformer)

Patent 5521728: Liquid crystal display device with improved blocking ability of frame area and increased prevention of electrostatic failure
(LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS : PARTICULAR EXCITATION OF LIQUID CRYSTAL : Electrical excitation of liquid crystal (i.e., particular voltage pulses, AC vs. DC, threshold voltages, etc.) : With particular switching device : Transistor : With silicon photodiode, N-I-N photoconductor structure, or P-I-P photoconductor structure)

Patent 5521729: Liquid crystal display device with control capacitor for gray scale
(LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS : PARTICULAR EXCITATION OF LIQUID CRYSTAL : Electrical excitation of liquid crystal (i.e., particular voltage pulses, AC vs. DC, threshold voltages, etc.) : With particular switching device : Transistor : With silicon photodiode, N-I-N photoconductor structure, or P-I-P photoconductor structure)

Patent 5521730: Photoconductive-type liquid crystal light valve with a shielding layer made of manganese oxide and silicon dioxide
(LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS : PARTICULAR STRUCTURE : Having significant detail of cell structure only : Photoconductive element (i.e., not used for exciting) : Cholesteric reflector)

Patent 5521731: Reflective type liquid crystal display device and method of making the same whereby the switching MIM has its first electrode used for signal
(LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS : PARTICULAR EXCITATION OF LIQUID CRYSTAL : Electrical excitation of liquid crystal (i.e., particular voltage pulses, AC vs. DC, threshold voltages, etc.) : With particular switching device : Two terminal nonlinear switching device (e.g., N-I-N, S-I-S, Ferroelectric, etc.) : Metal-insulator-metal (i.e., MIM) : With particular gate electrode structure)

Patent 5521732: Optical wavelength selection control system in optical networks
(OPTICAL COMMUNICATIONS : MULTIPLEX : Optical switching : Wavelength : Including photonic packet switching :)

Patent 5521733: Optical switching device for wavelength-multiplexing optical communication
(OPTICAL COMMUNICATIONS : MULTIPLEX : Optical switching : Wavelength : Time and wavelength)

Patent 5521734: One-dimensional optical data arrays implemented within optical networks
(OPTICAL COMMUNICATIONS : OPTICAL TRANSCEIVER : Including optical fiber or waveguide : Including optical fiber or waveguide)

 

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