| Patents for G01R 21 - Arrangements for measuring electric power or power factor (6,609) |
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| 04/20/1993 | US5204613 Balanced radio frequency power sensor |
| 04/15/1993 | WO1993007500A1 Solid state electric power usage meter and method for determining power usage |
| 04/15/1993 | CA2120912A1 Solid state electric power usage meter and method for determining power usage |
| 04/13/1993 | US5202638 Within an energized liquid body |
| 04/06/1993 | CA1315849C Apparatus and method for monitoring power |
| 04/01/1993 | WO1993006499A1 Improvements relating to the calibration of power meters |
| 04/01/1993 | WO1993006493A1 Method and apparatus for power measuring |
| 04/01/1993 | DE4132257A1 Electronic circuit for rapid detection of HF signal power - operates FET as passive component with self-regulated rectification of input signal |
| 03/31/1993 | EP0534726A1 Meters - e.g. energy consumption meters |
| 03/31/1993 | EP0534583A2 Convertible energy meter |
| 03/31/1993 | EP0533964A1 Device for forming a product of signals |
| 03/31/1993 | CN1070485A Power factor-voltage changer |
| 03/30/1993 | US5198751 Reactive volt-ampere-hour meter |
| 03/30/1993 | US5197291 Solar powered thermoelectric cooling apparatus |
| 03/23/1993 | US5196982 Electrical power monitoring system |
| 03/17/1993 | CN1070044A Method and apparatus for converting meter register constant |
| 03/16/1993 | US5194850 Process for metering electrical energy and device for carrying out the process |
| 03/10/1993 | EP0530448A1 Method for displaying the crossing of the starting-threshold of a static electricity meter |
| 03/04/1993 | WO1993004377A1 Method for identifying electrical power consumers on a circuit being monitored |
| 03/04/1993 | CA2094829A1 Process for identifying power consuming loads |
| 03/03/1993 | EP0529756A1 Method and apparatus for converting a meter register constant |
| 02/24/1993 | EP0528634A2 Energy monitoring system for a plurality of local stations with snapshot polling from a central station |
| 02/24/1993 | EP0496732A4 Electronic watt-hour meter |
| 02/24/1993 | CN1069342A Pliers type electric power meter |
| 02/17/1993 | EP0527617A2 Broad-band microwave power sensor using diodes above their resonant frequency |
| 02/16/1993 | US5186540 Power measurement calorimeter |
| 02/09/1993 | US5185568 Electronic instrument |
| 02/02/1993 | US5184119 Unauthorized utility use monitor apparatus and method |
| 01/27/1993 | EP0524378A1 Appliance for measuring the reactive power or -energy |
| 01/27/1993 | CN1019878C Comprehensive electric power monitoring method and apparatus |
| 01/19/1993 | US5181026 Power transmission line monitoring system |
| 01/06/1993 | CN1067744A Method and device for measuring electric power and energy |
| 12/24/1992 | DE4220145A1 Durch manuell betaetigbare tasten gesteuertes system By manually operable key controlled system |
| 12/22/1992 | US5173657 Method and apparatus for identification of electronic meter function capabilities |
| 12/16/1992 | EP0518637A2 Semiconductor radio-frequency power detector |
| 12/16/1992 | CN2125147U Static measuring current and voltage device |
| 12/08/1992 | US5170115 Sampling type measuring device |
| 11/12/1992 | WO1992020152A1 Rf power sensor having improved linearity over greater dynamic range_____________________________________________________________ |
| 11/12/1992 | DE4117133C1 Thermoelectric power measuring converter - has resistance electronically controllable by instantaneous value of input signal and temp. sensor on common support heat-insulated from surroundings |
| 11/11/1992 | CN2121693U Power load rate table |
| 11/10/1992 | US5162985 Measuring circuit for measuring instantaneous power across a non-reactive load |
| 10/28/1992 | EP0510956A1 Method for determining electrical energy consumption |
| 10/21/1992 | EP0509900A1 Microwave directional coupler on a mirror bend |
| 10/20/1992 | US5157288 Phase shifting circuits |
| 10/07/1992 | EP0506728A1 Method and apparatus for measuring electric units |
| 10/01/1992 | DE4109928A1 User electrical power consumption measuring system - is supplied respectively with current across supply lines which are connected together at central metering unit which determines power sum |
| 09/30/1992 | EP0505526A1 Maximum monitor, especially for rate calculation. |
| 09/29/1992 | US5151866 High speed power analyzer |
| 09/17/1992 | WO1992015889A1 Meter for measuring power consumption of an electrical appliance |
| 09/16/1992 | CN2116222U Power meter of submersible oil pump console cabinet |
| 09/09/1992 | CN1018200B Digital instrumentation or equipment for measuring real effective values of electric power and electric energy |
| 09/08/1992 | US5146157 Calculation apparatus for an electronic meter |
| 09/02/1992 | CN1064163A Data acquisition systems with programmable bit-serial digital signal processors |
| 08/25/1992 | US5140825 Method of operating a transport refrigeration unit |
| 08/19/1992 | EP0498953A2 Data acquisition systems with programmable bit-serial digital signal processors |
| 08/19/1992 | EP0498909A1 Electricity meter with tariff switching for the continuous acquisition and display of the amount of mains power, averaged over constant time intervals, used by a consumer |
| 08/11/1992 | CA1306286C Adjustment circuit and method for solid-state electricity meter |
| 08/05/1992 | EP0496732A1 Electronic watt-hour meter |
| 08/04/1992 | US5136514 Tariff arrangement with secure bidirectional interface |
| 07/29/1992 | CN2111532U Electronic indicator for maximum demand |
| 07/28/1992 | US5134578 Digital signal processor for selectively performing cordic, division or square-rooting procedures |
| 07/21/1992 | US5132610 Digitizing power meter |
| 07/15/1992 | EP0494428A2 Static electricity meter |
| 07/15/1992 | EP0494427A1 Electricity meter |
| 07/15/1992 | CN1017475B Multi-functional intelligence watt-hour meter |
| 07/15/1992 | CN1017474B Electric power-meter |
| 07/10/1992 | CA2058070A1 Electronic electricity meter |
| 07/10/1992 | CA2058050A1 Electricity meter |
| 07/08/1992 | EP0493964A2 Automated power system |
| 07/08/1992 | EP0465476A4 A sampling circuit |
| 07/07/1992 | US5128611 Electronic electricity meter |
| 06/23/1992 | US5124624 Arrangement for electrical measurement |
| 06/17/1992 | EP0490711A1 Electrical measuring device with two configurations of connection |
| 06/16/1992 | US5122735 Digital power metering |
| 06/10/1992 | CN2107023U Power frequency parameter measuring apparatus |
| 06/02/1992 | CA1302500C Instrument to measure the errors of apparent power meters |
| 05/19/1992 | US5115190 Freezing items for display in electronic watthour register |
| 05/19/1992 | CA1301249C Integrated poly-phase power meter |
| 05/05/1992 | US5110216 Fiberoptic techniques for measuring the magnitude of local microwave fields and power |
| 05/05/1992 | US5109595 Method of making a fiberoptic sensor of a microwave field |
| 04/30/1992 | WO1992007276A1 Maximum monitor, especially for rate calculation |
| 04/15/1992 | CN1016243B Recording device of electric brake for electric drived locomotive |
| 04/08/1992 | CN1060156A Comprehensive electric power monitoring method and apparatus |
| 03/24/1992 | US5099195 Electronic device for measuring electrical power supply to a load |
| 03/19/1992 | WO1991019201A3 System and method for monitoring and analyzing energy characteristics |
| 03/12/1992 | DE4028614A1 Measuring large currents with electricity meter - using Hall element in slotin annular ferrite core with main conductor forming current loop |
| 03/11/1992 | EP0473877A2 Sampling type measuring device |
| 03/05/1992 | WO1992003742A1 Analog multiplying-averaging circuit and wattmeter circuit using the circuit |
| 03/04/1992 | EP0472807A2 Method and apparatus for measuring volt-amps reactive power using synthesized voltage phase shift |
| 03/03/1992 | CA1296770C Wide dynamic range radio-frequency power sensor |
| 02/19/1992 | CN2096766U Three-phase combined power transmission and substating apparatus |
| 02/11/1992 | US5087881 Ic engine cylinder output power measurement apparatus by monitoring the output of an alternator driven by the engine |
| 02/04/1992 | US5086292 Tamper detection device for utility meter |
| 02/04/1992 | CA1295369C Electronic watt-hour meter with up and down integration for error correction |
| 01/23/1992 | DE4022623A1 Impedance converter for power measuring applications - uses current converter and power transformer supplied via amplifier |
| 01/15/1992 | EP0466453A2 Improvements in and relating to electricity meters using current transformers |
| 01/15/1992 | EP0465476A1 A sampling circuit |
| 01/14/1992 | US5081413 Method and apparatus for measuring AC power |
| 01/08/1992 | CN2092762U Intelligence card type voltage and current monitor |
| 01/07/1992 | US5079510 Meter for accurately measuring integrated electric power |