| Patents for G01R 21 - Arrangements for measuring electric power or power factor (6,609) |
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| 03/19/1980 | EP0008630A1 Power/frequency converter with a microcomputer |
| 03/18/1980 | US4194180 Apparatus for registering quantity values of corresponding volume or energy quantities by means of counters in a central station |
| 02/20/1980 | EP0007954A1 Quantity converting and indicating apparatus |
| 02/05/1980 | US4186563 Cooling efficiency meter circuit for an air conditioner |
| 01/08/1980 | US4182983 Electronic AC electric energy measuring circuit |
| 01/01/1980 | US4181950 Adaptive priority determination power demand control method |
| 12/25/1979 | CA1068824A Root mean square detector |
| 12/25/1979 | CA1068786A Differential thermal wattmeter |
| 12/18/1979 | US4179654 Demand meter including means for selectively controlling the length of demand intervals |
| 12/18/1979 | US4179624 Carrier control method by using phase-pulse signals |
| 12/18/1979 | CA1068342A1 Direction sensitive opto-electronic pulse initiator for electrical meters |
| 11/13/1979 | US4174499 Method and apparatus for the measurement of alternating-current power in transient and subtransient processes |
| 10/09/1979 | US4170752 System for determining and calculating the work done by a mobile electrical machine at an energy supply station |
| 09/11/1979 | US4167786 Load control processor |
| 09/06/1979 | WO1979000664A1 Demand metering system |
| 08/21/1979 | US4165485 Electronic watt-hour meter |
| 08/08/1979 | EP0003450A1 Measuring device for the field of hyperfrequencies and generator comprising such a device |
| 07/24/1979 | US4162530 Automatic energy supply systems of the multi-rate calculating type |
| 07/17/1979 | US4161720 Meter terminal unit for use in automatic remote meter reading and control system |
| 07/10/1979 | US4161028 Electric demand control system |
| 07/10/1979 | CA1058292A1 Multiple rate meter |
| 07/10/1979 | CA1058290A1 Three phase wattmeter |
| 06/19/1979 | US4158808 Load source simulator |
| 06/05/1979 | US4157502 Arrangement for determining the effective value and/or the power of electrical signals |
| 05/31/1979 | WO1979000293A1 Quantity converting and indicating apparatus |
| 04/03/1979 | US4147978 System for monitoring electrical energy consumption |
| 03/27/1979 | US4146836 Power monitor |
| 03/20/1979 | US4145652 Electric power to DC signal converter |
| 03/07/1979 | EP0000923A1 Device for detecting, measuring and indicating the energy consumption of electricity consumers |
| 02/27/1979 | CA1049627A1 Low cutoff digital pulse filter expecially useful in electronic energy consumption meters |
| 02/20/1979 | US4141069 Time dependent power demand control method |
| 01/30/1979 | CA1047604A1 Transformer having improved voltage and phase characteristics |
| 01/23/1979 | US4136393 Method of power demand control with time dependent target |
| 01/23/1979 | CA1047114A1 Electronic energy consumption meter with input transformer having single resistance terminated secondary winding coupled to c-mos switches driven by pulse width modulated control signals |
| 01/16/1979 | CA1046585A1 Single phase multi-wire electronic kwh meter |
| 01/16/1979 | CA1046584A1 Variable gain electronic current transformer |
| 01/02/1979 | US4132981 Self-powered system for measuring and storing consumption of utility meter |
| 12/26/1978 | US4131847 Device for measuring active and/or reactive component of AC current or AC power |
| 12/12/1978 | CA1044327A1 Induction watthour meter for power systems transmitting carrier communication signals |
| 11/14/1978 | US4125895 Maximum-power motor |
| 11/07/1978 | US4124835 Remotely controlled utility service interrupter system and apparatus |
| 10/03/1978 | US4118787 Analog multiplier error corrector, notably for precision wattmeters |
| 08/08/1978 | US4106095 Electrical usage display system |
| 08/01/1978 | US4104587 Bandwidth substitution method and system for absolute measurement of power at all radio frequencies |
| 06/20/1978 | US4096436 Power monitor |
| 05/30/1978 | US4092592 Electronic kWh meter having virtual ground isolation |
| 05/30/1978 | US4092590 Electronic three-phase four-wire system watt-hour meter |
| 05/09/1978 | US4088950 Immittance monitoring apparatus |
| 04/04/1978 | US4082999 Programmable variable-rate electric adapting device for watt-hour meters |
| 04/04/1978 | US4082998 Dual slope integration circuit |
| 03/28/1978 | US4081746 Multiple rate meter |
| 03/21/1978 | US4080568 Energy monitoring device |
| 03/21/1978 | US4080566 RF directional wattmeter |
| 03/14/1978 | US4079313 Digital watts transducer |
| 02/28/1978 | US4077061 Digital processing and calculating AC electric energy metering system |
| 02/21/1978 | US4075699 Power monitoring and load shedding system |
| 02/21/1978 | US4075697 Apparatus for monitoring two electric quantities by combining three consecutive samples of each quantity |
| 02/21/1978 | US4075554 Vswr meter circuit using variable rf attenuator |
| 02/14/1978 | US4074194 Watt meter providing electrical signal proportional to power |
| 01/03/1978 | US4066960 Electronic kilowatt-hour-meter with error correction |
| 12/20/1977 | US4064485 Digital load control circuit and method for power monitoring and limiting system |
| 12/06/1977 | US4061891 Test instrument for determining apparent power consumption and ground faults in various portions of a distributed-load, constant voltage audio distribution system |
| 11/29/1977 | US4060763 Arrangement for determining the effective value and/or the power of electrical signals |
| 11/15/1977 | US4058768 Two-way electronic kWh meter |
| 11/01/1977 | US4056775 Electronic kWh meter having internal power supply and error correction system |
| 11/01/1977 | US4056774 Electronic watthour meter circuit |
| 10/25/1977 | US4055804 Watt/watthour transducer and amplifier-filter therefor |
| 10/25/1977 | US4055803 Combined watt and var transducer |
| 10/11/1977 | US4053832 A.C. power meter |
| 10/04/1977 | US4052648 Power factor control system for ac induction motors |
| 09/27/1977 | US4051435 Microwave field detector |
| 09/27/1977 | US4051424 Digital amp-hour monitor |
| 08/30/1977 | US4045734 Differential thermal wattmeter |
| 08/30/1977 | US4045730 Incremental method and system for absolute measurement of coherent power at millimeter and submillimeter wavelengths |
| 08/23/1977 | US4044303 Microwave radiation detector |
| 08/09/1977 | US4041370 Apparatus for rapidly detecting and calculating the root mean square of electrical measuring values in alternating current networks |
| 07/05/1977 | US4034292 Direction sensitive opto-electronic pulse initiator for electrical meters |
| 07/05/1977 | US4034289 RF power monitor utilizing bi-directional coupler |
| 06/28/1977 | US4032798 Low cutoff digital pulse filter especially useful in electronic energy consumption meters |
| 06/07/1977 | US4028623 Three phase spin motor power meter |
| 05/31/1977 | US4027241 Solid state watt and var transducer |
| 03/29/1977 | US4015140 Multiplier for producing phase shift error-free signal representing product of out-of-phase inputs |
| 03/08/1977 | US4011529 Directional power detector for propagating waves |
| 03/08/1977 | US4011509 Apparatus for relative power measurements in a power meter |
| 02/22/1977 | US4008610 Self-balancing D.C.-substitution measuring system |
| 02/01/1977 | US4006348 Apparatus for monitoring two electric quantities by combining three consecutive samples of each quantity |
| 12/21/1976 | US3999046 Data acquisition system |
| 12/14/1976 | USRE29079 Multiplier, divider and wattmeter using a switching circuit and a pulse-width and frequency modulator |
| 12/14/1976 | US3996880 Field strength meter |
| 11/30/1976 | US3995210 Variable gain electronic current transformer |
| 11/30/1976 | US3995178 Pulse-width and frequency modulator circuit |
| 11/16/1976 | US3991984 Elastomer processing apparatus |
| 10/12/1976 | US3986114 Watt-hour counter |
| 08/24/1976 | US3976942 Watt hour transducer having current signals and a modulator therefor |
| 08/24/1976 | US3976941 Auto-ranging system for an electronic energy meter |
| 08/17/1976 | US3975682 Watt/watthour transducer and integrator and current sources therefor |
| 08/03/1976 | US3972470 D converters at various points of the power system |
| 06/01/1976 | US3961257 Single phase 3-wire electronic electrical energy meter |
| 05/25/1976 | US3959724 Electronic wattmeter |
| 05/04/1976 | US3955138 Electronic energy consumption meter with input transformer having single resistance terminated secondary winding coupled to C-MOS switches driven by pulse width modulated control signals |