| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
|---|
| 02/22/1989 | EP0303712A1 Device for detecting output voltage of a laser oscillator |
| 02/22/1989 | EP0303633A1 Battery monitoring and condition indicator system for multi-battery pack. |
| 02/21/1989 | US4807035 Signal measurement |
| 02/21/1989 | US4806933 CW and pulse capable crystal video receiver |
| 02/21/1989 | US4806855 System for rating electric power transmission lines and equipment |
| 02/21/1989 | US4806854 Current draw and power consumption display circuit |
| 02/21/1989 | US4806853 High accuracy frequency modulation waveform tester |
| 02/15/1989 | EP0303397A1 Signal waveform processing circuit |
| 02/15/1989 | EP0303289A2 D.C. power monitor |
| 02/15/1989 | CN2032724U Passive dc current digital indicator |
| 02/14/1989 | US4804922 Voltage sensor |
| 02/14/1989 | US4804917 Current detection device having an extended frequency range of response |
| 02/14/1989 | US4804910 Traction load meter system |
| 02/14/1989 | US4804909 Atto-amperemeter |
| 02/14/1989 | US4804903 System for measuring load current in an electronically controlled switch |
| 02/14/1989 | US4804895 Charge balancing current sampler for a digital motor control |
| 02/09/1989 | WO1989001254A1 I2t MONITORING CIRCUIT |
| 02/09/1989 | WO1989001166A1 Current detection device having an extended frequency range of response |
| 02/09/1989 | WO1989001165A1 Logic probe |
| 02/09/1989 | DE3725922A1 Method and arrangement for detecting even rapid electrical processes |
| 02/08/1989 | EP0302730A2 Isolated analog voltage sense circuit |
| 02/08/1989 | EP0302241A2 Voltage measurement with an electron-probe without an external trigger signal |
| 02/08/1989 | EP0302171A1 Appliance for transforming an electrial polyphase signal in a frequence |
| 02/07/1989 | US4803382 Voltage comparator circuit |
| 02/02/1989 | DE3724142A1 Circuit arrangement for detecting positive, negative or missing potential at the input |
| 02/01/1989 | EP0301291A1 Testing device for electric conductors and circuits |
| 02/01/1989 | EP0301254A2 Measuring voltage with an electron probe by measuring in the frequency region with a modulated primary beam |
| 02/01/1989 | CN2031984U Frequency-modulated fiber-optic dc/dc conversion and transmission device |
| 01/31/1989 | CA1249632A1 Polyphase electrical signal measuring apparatus |
| 01/26/1989 | WO1989000767A1 Light detector and signal processing circuit |
| 01/26/1989 | WO1989000701A1 Electric current sensor using the faraday effect |
| 01/25/1989 | EP0300560A2 Comparison circuit |
| 01/24/1989 | US4800337 Method and means for determining a measure of the surface potential of a medium charged by means of a corona charging device |
| 01/24/1989 | US4800301 Method and apparatus for sensing signals |
| 01/24/1989 | CA1249335A1 System for rating electric power transmission lines and equipment |
| 01/19/1989 | DE3815824A1 Circuit arrangement for the generation of at least one voltage proportional to current having at least one shunt |
| 01/18/1989 | EP0299427A2 Voltage detector |
| 01/18/1989 | CN2031102U Electronic rotary tool for low voltage electric testing |
| 01/17/1989 | US4799190 Data selection circuits, systems and methods |
| 01/11/1989 | CN2030728U Ac electroscope |
| 01/10/1989 | US4797624 Method and apparatus for editing particle produced electrical pulses |
| 01/10/1989 | US4797608 D.C. power monitor |
| 01/10/1989 | US4797607 Method of updating the scale factor of apparatus for measuring an alternating electric current by means of the faraday effect |
| 01/10/1989 | US4797603 Device for measuring the ratio of two low value capacities |
| 01/10/1989 | US4797569 Apparatus for pre-defining circuit characteristics |
| 01/04/1989 | EP0297701A2 Method for measuring pulse parameters |
| 01/04/1989 | EP0297562A2 Voltage detector |
| 01/03/1989 | US4796283 Surge counter for an overvoltage arrester |
| 01/03/1989 | US4795972 Digital measuring method and apparatus for a quasi-analog measured value display |
| 01/03/1989 | US4795970 Electrical apparatus |
| 01/03/1989 | US4795919 Zero signal state detecting circuit |
| 01/03/1989 | US4795915 Zero crossing noise-rejecting digital filter |
| 12/28/1988 | EP0296966A2 Triangle waveform generator for pulse-width amplitude multiplier and associated method |
| 12/28/1988 | CN87208987U Acoustic signal measuring gange |
| 12/27/1988 | US4794332 Fault indicator having improved trip inhibit circuit |
| 12/27/1988 | US4794331 Circuit condition monitoring system having integral test point |
| 12/27/1988 | US4794329 Cable mounted capacitively-coupled circuit condition indicating device |
| 12/21/1988 | EP0295413A1 Mechanical probe for the optical measurement of electrical potentials |
| 12/21/1988 | CN88102088A Method of updating scale factor of apparatus for measuring alternating electric current by means of faraday effect |
| 12/20/1988 | CA1247245A1 Circuit for the real time analysis of the energy distribution of pulses of a pulse signal |
| 12/15/1988 | DE3734365A1 An additional indicator display for a digital measuring device |
| 12/14/1988 | EP0294836A2 Voltage detector |
| 12/14/1988 | EP0294817A2 Voltage detecting device |
| 12/14/1988 | EP0294816A2 Voltage detecting device |
| 12/14/1988 | EP0294815A2 Voltage detecting device |
| 12/14/1988 | EP0294593A1 Mechanical probe for the optical measurement of electrical signals |
| 12/14/1988 | EP0294590A2 Compensation principle current sensor |
| 12/14/1988 | EP0294468A1 Digital receiver with dual references |
| 12/14/1988 | EP0294449A1 Computer-aided probe with tri-state circuitry test capability |
| 12/08/1988 | DE3817156A1 Verfahren und geraet zur bestimmung von wechselspannungs(ac)-kalibrierfehlern und geraet mit einer einrichtung zur lieferung von wechselspannungs(ac)-kalibrierfehlern Method and apparatus for the determination of alternating voltage (ac) -kalibrierfehlern and geraet with a device for delivery of alternating voltage (ac) -kalibrierfehlern |
| 12/08/1988 | DE3716921A1 Method and circuit arrangement for determining a peak value |
| 12/07/1988 | EP0293922A2 Voltage detector |
| 12/07/1988 | EP0293873A2 A signal distinction circuit |
| 12/07/1988 | EP0293840A2 Voltage detector |
| 12/07/1988 | EP0293788A1 Voltage detector |
| 12/07/1988 | CN88103246A Method of and apparatus for determining ac calibration errors and apparatus using device with ac calibration errors |
| 12/06/1988 | US4789953 Circuit arrangement for averaging |
| 12/01/1988 | WO1988009489A1 Test meters |
| 11/29/1988 | US4788622 Device for indicating the short-circuiting of a lightning arrester |
| 11/29/1988 | US4788507 Peak timeout indicator/encoder and method |
| 11/29/1988 | US4788493 Apparatus for detecting direction of electric power flow |
| 11/29/1988 | US4788454 Power-on reset circuit |
| 11/29/1988 | US4788446 Monitoring circuit for an electric or electronic module |
| 11/24/1988 | DE3715528A1 Current monitoring circuit with inductive converters |
| 11/23/1988 | EP0292270A2 Voltage detection circuit |
| 11/23/1988 | CN88200639U Spread voltage measuring device for dc transmission line insulator |
| 11/22/1988 | US4786859 RMS measuring apparatus for AC/DC voltages |
| 11/22/1988 | CA1245289A1 Rms calculation circuit for digital circuit interrupters |
| 11/17/1988 | EP0291191A1 NMOS analog voltage comparator |
| 11/17/1988 | EP0290780A1 Electric current measuring appliance using the Faraday effect in a Sagnac interferometer |
| 11/16/1988 | CN87217029U Ir drop measuring apparatus |
| 11/16/1988 | CN87103289A Wet sand-aerating machine |
| 11/15/1988 | US4785406 Quad exchange power controller |
| 11/15/1988 | US4785294 Static monitoring system |
| 11/15/1988 | US4785237 Amplifier with D.C. compensation |
| 11/15/1988 | US4785236 Device for measuring voltage by scanning |
| 11/09/1988 | EP0289791A1 Process for updating the scale factor of an electric alternating current measuring appliance using the Faraday effect |
| 11/09/1988 | EP0289618A1 Electric resistor equipped with thin film conductor and power detector |
| 11/03/1988 | DE3712783A1 Method for checking the operability of a test device for high-voltage conductors and test device |
| 11/02/1988 | EP0289370A1 MOS technique device for detecting the high level of a voltage |