| Patents for G01R 27 - Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom (22,286) |
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| 02/18/1992 | US5089781 Electromagnetic conductivity meter and a conductivity measuring method |
| 02/13/1992 | DE4025093A1 Temperature compensated fluid conductivity measuring circuit - uses fluid filled pipe section as coupling conductor between two annular cores |
| 02/12/1992 | EP0470368A2 Method and circuit for inductive measuring of conductivity of liquids |
| 02/12/1992 | EP0470367A2 Device for measuring the conductivity of fluids |
| 02/11/1992 | CA1295681C Apparatus for measuring capacitance of a low value three-terminal capacitor with a resonance technique |
| 02/07/1992 | WO1992002809A1 Transient electromagnetic inspection method and apparatus with moving sensors |
| 02/06/1992 | WO1992001944A1 Electrical test apparatus |
| 02/05/1992 | EP0469634A1 Pulse phase adjusting circuit for use with an electrostatic capacitor type sensor |
| 02/04/1992 | US5086278 Circuit element measuring method and apparatus |
| 02/04/1992 | US5086274 Variable frequency magnetic field device employing multiple antennae for measuring the surface impedance of a material |
| 01/23/1992 | WO1992001233A1 Method and apparatus for resistance measurements on a semiconductor element |
| 01/23/1992 | WO1992001232A1 Method and apparatus for testing a proctective barrier material for pinholes and tear strength |
| 01/21/1992 | US5083114 Ground fault indicating device |
| 01/21/1992 | US5083092 Stand-on type resistance tester for electrostatic dissipating shoe equipped persons |
| 01/21/1992 | US5083090 Contactless measurement of the electrical resistance per unit length of filaments |
| 01/21/1992 | US5083088 Microwave test fixtures for determining the dielectric properties of a material |
| 01/21/1992 | US5083080 High frequency signal measuring equipment with cabled detecting and signal companding |
| 01/15/1992 | EP0466274A1 Method and apparatus for resistance measurements on a semiconductor element |
| 01/14/1992 | US5081421 In situ monitoring technique and apparatus for chemical/mechanical planarization endpoint detection |
| 01/14/1992 | CA1294355C Apparatus for rapid recognition of short-circuits |
| 01/09/1992 | WO1992000504A1 Device for reliably detecting faults and suppressing noise peaks in potentiometer assessment |
| 01/09/1992 | DE4020732A1 Manual analog input circuitry for microprocessor, etc. - has charge circuit with DC voltage source for included capacitor, with start switches |
| 01/08/1992 | CN2092761U Testing pen comprised of window circuit |
| 01/02/1992 | DE4020106A1 Einrichtung zur sicheren ausfallerkennung und rauschspitzenunterdrueckung bei einer potentiometerauswertung Means for safe failure detection and rauschspitzenunterdrueckung at a potentiometer measurement |
| 01/01/1992 | CN1057539A Measuring method of pulse width with serial output resistance method |
| 12/31/1991 | US5077528 Transient free high speed coil activation circuit and method for determining inductance of an inductor system |
| 12/31/1991 | US5077525 Electrodeless conductivity sensor with inflatable surface |
| 12/31/1991 | US5077522 Device for the dielectric characterization of samples made of a material having a flat or uneven surface and application for the non-destructive control of the dielectric homogeneity of said samples |
| 12/26/1991 | WO1991019991A1 Insulator aging assessment method |
| 12/19/1991 | DE4034699C1 Resistance measuring circuit using voltage transducer - has operational amplifier with non-inverted input connected to reference voltage source |
| 12/17/1991 | US5073920 Method and apparatus of measuring a subscriber line |
| 12/17/1991 | US5073758 Resistance measurement in an active and high temperature environment |
| 12/17/1991 | US5073757 Apparatus for and method of measuring capacitance of a capacitive element |
| 12/17/1991 | US5073755 Method and apparatus for measuring the electrical properties of dielectric film in the gigahertz range |
| 12/12/1991 | WO1991019342A1 Process for testing devices |
| 12/12/1991 | WO1991019206A1 Electronic circuitry for detecting leakage of chemical substance |
| 12/12/1991 | WO1991019205A1 Fault detection apparatus |
| 12/12/1991 | WO1991019203A1 Zero impedance switch |
| 12/11/1991 | EP0460552A2 Coating thickness measurement gauge |
| 12/10/1991 | US5072190 Pressure sensing device having fill fluid contamination detector |
| 12/10/1991 | US5072189 Measuring the magnitude of the reflection |
| 12/10/1991 | US5072188 Apparatus for measuring the conductivity of paint spray using an electromagnetic wave |
| 12/10/1991 | US5072186 Method and apparatus for interturn and/or interlayer fault testing of coils |
| 12/04/1991 | EP0459782A2 Amperimetric measurement with cell electrode deplating |
| 12/04/1991 | CN1015023B Method of measuring impedance, especially low-voltage capacity impedance |
| 12/03/1991 | CA1292774C Microwave moisture measurement using two microwave signals of different frequency and phase shift determination |
| 11/30/1991 | WO1991019202A1 Method and system for concurrent electronic component testing and lead verification |
| 11/30/1991 | CA2083701A1 Method and system for concurrent electronic component testing and lead verification |
| 11/28/1991 | DE4016961A1 Metal strip electrical surface resistance measurement - determining deposited strip thickness by direct contact over part of strip width and indirect contact over remainder |
| 11/26/1991 | US5068619 Conductivity measuring device |
| 11/26/1991 | CA1292513C Circuit for measuring the dynamic characteristics of a package for high-speed integrated circuits and a method for measuring said dynamic characteristics |
| 11/21/1991 | EP0457515A1 Capacitive position detector |
| 11/20/1991 | CN1056353A Method for determining solute in high-temperature water |
| 11/19/1991 | US5066920 Correction procedure of the phase difference introduced by a zero sequence toroid of leakage current and isolation monitor this procedure |
| 11/19/1991 | US5066912 Calibratable non-contact inductive distance measuring device |
| 11/15/1991 | WO1991018296A1 Method and apparatus for bleaching textile webs |
| 11/15/1991 | CA2083036A1 Method and apparatus for bleaching textile webs |
| 11/14/1991 | DE4014395A1 Capacitance-voltage-characteristic measuring appts. - integrates capacitive element output current during periodic voltage application |
| 11/13/1991 | CN1056162A In situ monitoring technique and apparatus for chemical/mechanical planarization endpoint detection |
| 11/12/1991 | WO1991018257A1 Contact measuring device for determining the dry film thickness of a paint on a plastic substrate |
| 11/12/1991 | US5065106 Apparatus and method for analyzing dielectric properties using a single surface electrode and force monitoring and adjusting |
| 11/12/1991 | CA2082412A1 Contact measuring device for determining the dry film thickness of a paint on a plastic substrate |
| 11/06/1991 | EP0455455A2 In situ monitoring technique and apparatus for chemical/mechanical planarization endpoint detection |
| 11/05/1991 | US5063391 Method of measuring chiral parameters of a chiral material |
| 11/05/1991 | US5063353 Method for accurate measurement of transmission line impedance by correcting gross impedance for the "dribble-up" effect |
| 11/03/1991 | CA2038991A1 Transient free high speed coil activation circuit |
| 10/30/1991 | EP0454012A2 Test device with D.C. current source |
| 10/29/1991 | US5060860 Paint conductivity measurement system |
| 10/23/1991 | CN1055604A Wireless loss monitoring method for low-voltage circuits |
| 10/22/1991 | US5059915 Vector network analyzer RF pulse profiling method and apparatus |
| 10/22/1991 | US5059908 Amperimetric measurement with cell electrode deplating |
| 10/22/1991 | US5059902 Electromagnetic method and system using voltage induced by a decaying magnetic field to determine characteristics, including distance, dimensions, conductivity and temperature, of an electrically conductive material |
| 10/22/1991 | CA1291215C Fault detection |
| 10/22/1991 | CA1290958C Channel device and tube connection and their fabrication procedures |
| 10/17/1991 | WO1991015776A1 Waveshape display device for facilitating observation of fine waveshape simply |
| 10/17/1991 | WO1991015755A1 Process and device for determining the electrical conductivity of a test specimen made of superconducting material |
| 10/16/1991 | EP0451955A2 Swept signal analysis instrument and method |
| 10/16/1991 | EP0451701A1 Method for contactless measuring of electrical resistance of a material to be examined |
| 10/16/1991 | EP0290513B1 Method for detecting thickness variations in the wall of a current conducting tubular body |
| 10/15/1991 | US5058087 Process for determining the electrical duration of signal paths |
| 10/15/1991 | US5057965 Work station monitor |
| 10/15/1991 | US5057783 Automatic impedance matching |
| 10/15/1991 | US5057772 Method and system for concurrent electronic component testing and lead verification |
| 10/09/1991 | EP0450750A2 Lockproof low level oscillator using digital components |
| 10/09/1991 | EP0449967A1 Device for automatically ascertaining capacitance, dissipation factor and insulation resistance of a plurality of capacitors. |
| 10/08/1991 | US5055807 Method and apparatus for multiplexing broad band high frequency signals for use in network analyzers |
| 10/08/1991 | CA1290398C Method and apparatus for isolating faults in an antenna system |
| 10/03/1991 | WO1991014945A1 Directional sampling bridge |
| 10/03/1991 | CA2035645A1 Lockproof low level oscillator using digital components |
| 10/02/1991 | EP0449791A2 A method for determining the end of useful life of a gas purifier and apparatus therefor |
| 10/02/1991 | EP0449744A1 Directional sampling bridge |
| 10/02/1991 | DE4004146A1 75 ohm reflection factor measurement bridge - with signal divider incorporating specified non-precision resistors, connected to indicator and reference resistor |
| 10/02/1991 | CN2085969U Tester for ground resistance of human body |
| 10/01/1991 | US5053733 Method and apparatus for multiplexing broad band high frequency signals for use in network analyzers |
| 10/01/1991 | US5053725 Circuit configuration for the automatic tuning of a matching network |
| 09/25/1991 | EP0448419A1 Device for measuring the quality of the contact between two electrical conductors |
| 09/25/1991 | EP0447449A1 Means and method for measuring inductance. |
| 09/24/1991 | US5051916 Stimulus signal generation method to maximize dynamic range in frequency response function calculations |
| 09/24/1991 | US5051690 Apparatus and method for detecting vertically propagated defects in integrated circuits |
| 09/12/1991 | DE4006869A1 Measuring s-parameter appts. for VHF 4-pole appts. - contains reference signal phase converter between signal power divider and signal selector |