| Patents for G01R 29 - Arrangements for measuring or indicating electric quantities not covered by groups (11,937) |
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| 11/26/1991 | US5068620 Circuit for securing output distortion, in particular of final stages of audio devices |
| 11/26/1991 | US5068616 Monitoring process and device of a quasi-closed electromagnetic shield |
| 11/26/1991 | US5068615 Noise parameter test apparatus |
| 11/25/1991 | CA2043100A1 Circuit for providing dv/dt immunity |
| 11/21/1991 | EP0457582A2 Level detecting circuit |
| 11/21/1991 | EP0457294A1 Electromagnetic field analyzer for devices in which electromagnetic field is present near conductor and electric charge moves in the electromagnetic field, and method of analyzing electromagnetic field |
| 11/21/1991 | EP0456763A1 Sensor |
| 11/19/1991 | US5066921 Radome diagnostic system |
| 11/19/1991 | US5066918 Apparatus and method for measuring lateral charge distribution on a moving web |
| 11/13/1991 | CN2088698U Wide band all direction danger radiacmeter |
| 11/12/1991 | US5065334 Method and apparatus for distinguishing narrowband continuous wave signals from broadband and impulsive signals |
| 11/12/1991 | US5065102 Apparatus for detecting distribution of electric surface potential |
| 11/07/1991 | DE4110412A1 Identification appts. for electrical leads and safety devices - comprises received tuned to transmitter connectable to socket in section of power supply installation to be tested |
| 11/05/1991 | US5063363 Electromagnetic energy radiation pick-up |
| 10/30/1991 | EP0453693A1 Electric field pockels effect sensor |
| 10/30/1991 | CN1055836A Method of and apparatus for automatically calibrating phased-array antenna |
| 10/23/1991 | EP0452818A2 Electrostatic recorder and electrostatic latent image measuring instrument |
| 10/23/1991 | EP0452799A1 Method and apparatus for the automatic calibration of a "phased array" antenna |
| 10/22/1991 | US5059909 Determination of particle size and electrical charge |
| 10/22/1991 | CA1291220C Multiple antennae breast screening system |
| 10/16/1991 | EP0452023A2 Method and apparatus for pulse sorting |
| 10/15/1991 | US5057848 Broadband frequency meter probe |
| 10/09/1991 | CN1055241A 静电动态电位测量装置 Static dynamic potential measuring device |
| 10/08/1991 | US5055828 Parasitic-ground current indicator for electrical system |
| 10/08/1991 | US5055806 Reflection-free termination of a tem waveguide |
| 10/08/1991 | US5055794 Static induction electric apparatus |
| 10/08/1991 | US5055769 Method and apparatus for identifying AC service configuration |
| 10/08/1991 | US5055757 Automatic toriod turns counter |
| 10/02/1991 | DE4010448A1 Arrangement for calibrating frame antennae e.g. field strength meters - by placing antenna as receiver of precomputed mean field strength from transmitting antenna |
| 10/02/1991 | CN1055065A Semiconductor laser electric field distribution measuring method and device thereof by continuous electrooptic detecting technique |
| 10/01/1991 | US5053714 Measuring circuit of the additive phase noise characteristic of a component in the vicinity of a carrier frequency |
| 10/01/1991 | US5053712 Method for comparing the quality of rf absorbers |
| 10/01/1991 | US5053694 Device for measuring an electric field |
| 10/01/1991 | US5053693 Fibreoptical sensor |
| 09/24/1991 | CA1289624C Method and apparatus for setting the signal-to-noise ratio of a carrier wave |
| 09/19/1991 | WO1991009317A3 Comb generator, device and process for calibrating measurement sections |
| 09/17/1991 | US5049828 Method and apparatus for parameter measurement of coupled-dual resonator crystals |
| 09/17/1991 | US5049766 Delay measuring circuit |
| 09/10/1991 | WO1991014313A1 Method and apparatus for autoranging, quadrature signal generation, digital phase reference, and calibration in a high speed rf measurement receiver |
| 09/10/1991 | US5048054 Line probing modem |
| 09/10/1991 | US5047726 Method and apparatus for implementing four-frequency measuring process for coupled-dual resonator crystals using both resonator ports |
| 09/10/1991 | CA2077657A1 Method and apparatus for autoranging, quadrature signal generation, digital phase reference, and calibration in a high speed rf measurement receiver |
| 08/28/1991 | EP0443069A1 Method of measuring the electric or magnetic field pattern with a sensor arrangement |
| 08/27/1991 | US5043909 Method and device for excess modulation detection for signal analysis |
| 08/27/1991 | US5043666 Self-calibrating electromagnetic field sensor for locating buried conduits |
| 08/22/1991 | WO1991012541A1 Atmospheric potential measurement device |
| 08/22/1991 | DE4004969A1 Quartz oscillator mechanical resonant frequency measuring CCT - contains bridge circuit in PLL feedback loop and potentiometer set to null |
| 08/21/1991 | EP0442670A1 Four frequency measuring process for coupled-dual resonator crystals |
| 08/21/1991 | EP0441898A1 Optical sensing apparatus and method. |
| 08/20/1991 | US5041779 Nonintrusive electro-optic field sensor |
| 08/20/1991 | CA1287884C High impedance fault analyzer in electric power |
| 08/17/1991 | CA2034438A1 Third case associated with the four frequency measuring process for coupled-dual resonator crystals |
| 08/14/1991 | EP0441587A2 Multi-channel electrostatic sensor apparatus |
| 08/14/1991 | DE4003670A1 Tomographic measuring device - measures three=dimensional micro-magnetic or microelectronic fields with rotating device |
| 08/14/1991 | CN2082869U High voltage multifunctional testing instrument |
| 08/13/1991 | US5039936 Voltage rotation indicator mounting apparatus |
| 08/06/1991 | CA1287378C Apparatus for judging quality of mobile data communication |
| 08/03/1991 | WO1991011724A1 Integrated optics pockels cell voltage sensor |
| 07/30/1991 | US5036270 Apparatus for detecting electrostatic surface potential |
| 07/30/1991 | CA1287109C Microwave radiometer |
| 07/24/1991 | EP0437425A1 Process and device for monitoring failures of timing signals |
| 07/24/1991 | CN1013308B Coil winding-direction tester |
| 07/23/1991 | US5034686 Weapon interface system evaluation apparatus and method |
| 07/23/1991 | CA1286724C Method and apparatus for monitoring electromagnetic emission levels |
| 07/17/1991 | EP0437362A2 Adjacent channel selectivity signal generator system |
| 07/17/1991 | EP0436640A1 Method and apparatus for charge distribution analysis |
| 07/12/1991 | CA2019291A1 Adjacent channel selectivity signal generator system |
| 07/02/1991 | US5029273 Integrated optics Pockels cell voltage sensor |
| 06/27/1991 | WO1991009317A2 Comb generator, device and process for calibrating measurement sections |
| 06/26/1991 | EP0433824A1 Fibre-optical sensor |
| 06/25/1991 | US5027046 Circuit and method for monitoring voltage pulse widths |
| 06/25/1991 | CA1285322C Digital measuring instrument |
| 06/18/1991 | US5025208 Method of measuring radio-frequency interfering voltages |
| 06/12/1991 | CN1012864B Reflection-free termination of tem waveguide |
| 06/05/1991 | EP0430747A1 Fiber optic measuring device, gyroscope and system for navigation and stabilisation |
| 06/05/1991 | EP0430119A2 Electric field detector for a heatable windshield |
| 06/02/1991 | WO1991008493A2 Method and device for comparing two variable analog signals |
| 06/02/1991 | CA2046652A1 Method and device for comparing two variable analog signals |
| 05/28/1991 | US5019995 Input signal discrimination method |
| 05/23/1991 | DE4100250A1 Measuring keying ratio of clock signals - quantising signal to be evaluated in series binary form several times by triggering flip=flop by noise generator |
| 05/23/1991 | DE3938239A1 EM tolerance test chamber for electrical appts. - sets max. resonance field strength for desired test frequency by moving wall |
| 05/21/1991 | US5018018 Apparatus for detecting distribution of electric surface potential |
| 05/21/1991 | US5017878 Measuring and limiting EMI with a differential mode rejection network |
| 05/21/1991 | US5017874 Method and apparatus for detecting and indicating anomalies in the operation of the ignition systems of internal combustion engines |
| 05/15/1991 | EP0427135A2 Circuit for sensing output distortion, in particular of final stages of audio devices |
| 05/14/1991 | US5016136 Charge build-up and decay monitor |
| 05/14/1991 | US5016020 Transceiver testing apparatus |
| 05/14/1991 | US5016018 Aperture synthesized radiometer using digital beamforming techniques |
| 05/08/1991 | CN2076679U Multifunctional test pencil |
| 05/07/1991 | US5012808 Pulse generation, parameter determination, and modification system |
| 05/02/1991 | EP0425303A2 Delay measuring circuit |
| 04/24/1991 | EP0423109A1 Radio frequency detector |
| 04/23/1991 | US5010403 Measurement of timebase jitter for component video |
| 04/17/1991 | EP0151633B1 An interruptible voltage-controlled oscillator |
| 04/17/1991 | CN1050772A Circuit and method for pulse width measurement |
| 04/17/1991 | CN1012406B Optical receptor |
| 04/16/1991 | US5008631 Pulse analyzer with gain compression |
| 04/10/1991 | EP0421690A2 Circuit and method for pulse width measurement |
| 04/09/1991 | US5006788 Method and apparatus for monitoring electromagnetic emission levels |
| 04/05/1991 | CA2024746A1 Circuit and method for pulse width measurement |