| Patents for G01R 21 - Arrangements for measuring electric power or power factor (6,609) |
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| 06/07/1988 | CA1237776A1 Time-of-use watt-hour meter with demand profile capability |
| 06/01/1988 | EP0268796A2 Static electricity meter |
| 05/18/1988 | EP0267693A1 Electric power measuring device |
| 05/11/1988 | EP0266488A1 Ninety degrees phase shifter |
| 05/03/1988 | US4742296 Arrangement for measuring electrical power |
| 05/03/1988 | CA1236164A1 Device for monitoring consumption of electrical power |
| 04/27/1988 | EP0265172A1 Electric power measuring devices |
| 04/27/1988 | CN86108827A Electric heater calibrating apparatus |
| 04/26/1988 | US4740763 For very high power; absorber-chamber with octanol |
| 04/13/1988 | EP0263154A1 Multimeter. |
| 04/12/1988 | CA1235184A1 Tieline control |
| 03/30/1988 | EP0261526A1 Electronic electricity meter |
| 03/30/1988 | CN87207248U Portable multifunctinal a.c. periodic wave meter |
| 03/22/1988 | US4733170 Microwave power sensors |
| 03/15/1988 | US4731576 Alternating current watt transducer |
| 03/02/1988 | CN86206539U Electric power timing and limiting controller |
| 03/01/1988 | US4728886 Method and apparatus for converting an electrical signal into a proportional frequency |
| 02/23/1988 | CA1233203A1 Wattmeter |
| 02/16/1988 | US4725838 Method for processing analog output signals from current and voltage transducers and facility for carrying out the method |
| 01/21/1988 | DE3622771A1 Arrangement for energy measurement in two separate, multi-phase supply circuits |
| 01/20/1988 | EP0253482A1 Measuring adjacent channel power |
| 01/19/1988 | US4720841 Developing a digital signal that is integrated measure of an analog voltage |
| 01/05/1988 | US4717872 Device for monitoring consumption of electrical power |
| 12/23/1987 | DE3620439A1 Apparatus and method for the purpose of acquiring load data from current pick-offs (current collectors, moving contacts) with the aid of a microprocessor having an integrated multifunction display, cos (y) detection and maximum load monitoring, and a residual current device (fault-current protection circuit breaker) |
| 12/15/1987 | US4713608 Apparatus for providing cost efficient power measurement |
| 12/09/1987 | EP0248137A1 System for accumulating verifiable energy demand data from remote electricity meters |
| 12/02/1987 | EP0247029A1 Memory programmer interface for electronic demand register |
| 12/02/1987 | CN87201176U A/d convertor module board for electrotechnical test |
| 11/25/1987 | EP0246401A1 Device at the current input of a measuring apparatus serving for the simultaneous measurement of two quantities |
| 11/24/1987 | US4709375 Digital phase selection system for signal multipliers |
| 10/22/1987 | WO1987006352A1 Multimeter |
| 10/21/1987 | EP0242163A1 Solid state electricity meter |
| 10/20/1987 | US4701698 Microprocessor based energy consumption meter |
| 10/15/1987 | DE3615402A1 System for the remote reading of electricity meters |
| 10/15/1987 | DE3611689A1 Recording tester having an upstream-connected measurement converter |
| 10/15/1987 | DE3611680A1 Method for measurement conversion |
| 10/14/1987 | CN86101442A Milimeterwave full band power meter |
| 10/13/1987 | US4700188 Electric power measurement system and hall effect based electric power meter for use therein |
| 10/07/1987 | EP0240102A2 Power meter having self-test function |
| 10/06/1987 | CA1227832A1 Appartus for delectinf failures in a chopper equipped electrical power supply |
| 09/29/1987 | US4697182 Method of and system for accumulating verifiable energy demand data from remote electricity meters |
| 09/29/1987 | US4697181 System for accumulating verifiable energy demand data from remote electricity meters |
| 09/29/1987 | US4697180 System for accumulating verifiable energy demand data from remote electricity meters |
| 09/16/1987 | CN86202216U Digital type power-factor meter |
| 09/09/1987 | EP0235324A1 Method for determining the temperature of electric installations in use |
| 09/08/1987 | US4692874 Electronic watt-hour meter |
| 08/19/1987 | EP0232763A1 Electronic electricity meter |
| 08/19/1987 | EP0232451A1 Method and device for the conversion of an electrical signal into a proportional frequency |
| 08/19/1987 | CN87100875A Method and apparatus for converting electrical signal into proportional frequency |
| 08/12/1987 | EP0232173A2 Electrical energy-consumption analyser |
| 08/11/1987 | US4686460 Solid state electricity meter display |
| 08/06/1987 | DE3603427A1 Electronic multiplication circuit |
| 07/28/1987 | US4683472 Signal reading system such as for remote reading of meters |
| 07/21/1987 | US4682169 Method of and system for accumulating verifiable energy demand data from remote electricity meters |
| 07/21/1987 | US4682102 Solid state watthour meter with switched-capacitor integration |
| 07/08/1987 | EP0228265A2 Microwave power amplifier |
| 07/08/1987 | EP0228155A1 Electronic circuit for measuring electrical energy |
| 07/07/1987 | US4677988 Method and apparatus for measuring microwave noise |
| 06/17/1987 | CN86208293U Intelligent electrical load tester |
| 06/16/1987 | US4673872 Packaging for electronic demand register |
| 06/09/1987 | US4672555 Determining the value of a plurality of ac power parameters |
| 06/09/1987 | US4672236 Voltage-to-frequency converter circuit |
| 06/03/1987 | EP0223956A1 Circuit arrangement for indicating the current and/or power consumption of an electrical load |
| 06/02/1987 | US4670713 Tieline control |
| 05/27/1987 | EP0223163A1 Power measuring sensor for measuring high-frequency power |
| 05/21/1987 | DE3625011A1 Device for measuring the active power in a load circuit, constructed as resonance circuit, of an electrical static converter |
| 05/19/1987 | US4667152 Method of and system for determining locations of sources of harmonics in a power distribution network |
| 05/12/1987 | US4665358 Solid state electronic pulse scaler using ratio of two integers |
| 05/07/1987 | WO1987002783A1 Memory programmer interface for electronic demand register |
| 05/07/1987 | DE3538938A1 Method for obtaining an electrical measurement quantity which is proportional to the square of the rms value of an electrical signal |
| 05/05/1987 | US4663587 Electronic circuit for measuring electrical energy |
| 05/05/1987 | CA1221418A1 Method and machine for metering electric parameters |
| 04/22/1987 | EP0218905A1 Low-cost self-contained transformerless solid state electronic watthour meter having thin film ferromagnetic current sensor |
| 04/21/1987 | US4660035 Remote monitoring system |
| 04/21/1987 | CA1220820A1 Metering system for measuring parameters of high ac electric energy flowing in an electric conductor |
| 04/02/1987 | DE3534085A1 Electronic circuit for the multi-phase measurement of electrical energy and power |
| 04/01/1987 | EP0215928A1 Power meter with display of power consumed and cost of power consumed |
| 03/31/1987 | US4654662 Apparatus for telemetry apparatus for reading utility meters |
| 03/31/1987 | US4654588 Time-of-use watt-hour meter with demand profile capability |
| 03/24/1987 | US4652855 Portable remote meter reading apparatus |
| 03/11/1987 | EP0213424A1 Method of measuring electric energy |
| 03/11/1987 | EP0213344A1 Process and circuit arrangement for measuring the active and reactive current in an AC network |
| 03/03/1987 | US4647848 For detecting the power level present in a radio frequency signal |
| 02/24/1987 | CA1218414A1 Electronic watt/watthour meter with automatic error correction and high frequency digital output |
| 02/24/1987 | CA1218413A1 Multi-function electricity metering transducer |
| 02/11/1987 | CN86100655A Intelligent multi-function power meter |
| 02/10/1987 | US4642635 Remote meter reading system |
| 02/04/1987 | EP0210373A2 Calibrated power detector |
| 01/28/1987 | EP0209962A1 Power sensors |
| 01/28/1987 | EP0209727A1 Process and spectrometer for the determination of the power of microwaves in a hollow oversized microwave guide |
| 01/27/1987 | US4639728 Method of and system for accumulating verifiable energy demand data from remote electricity meters |
| 01/20/1987 | US4638314 Meter transponder hybrid |
| 01/15/1987 | DE3524581A1 Method and circuit for the fast determination of electrical quantities of alternating-current systems |
| 01/06/1987 | US4634968 Wide range radiation monitor |
| 01/02/1987 | DE3620484A1 Verfahren zum messen der einer last gelieferten elektrischen energie A method for measuring the electrical energy supplied to a load |
| 12/30/1986 | EP0205773A1 Arrangement with at least one current transformer for the determination of the overloading of a current transformer possessing at least two windings |
| 12/24/1986 | CN85104789A System for measuring the electrical consumption |
| 12/23/1986 | US4631476 Memory programmer interface for electronic demand register |
| 12/16/1986 | US4630211 Watt-hour meter display for informing consumer of energy consumption |
| 12/16/1986 | CA1215429A1 Electronic solid state q-hour meter and/or combination q-hour and kilowatt-hour meter |