| Patents for G01R 21 - Arrangements for measuring electric power or power factor (6,609) |
|---|
| 04/28/2004 | CN1493002A Electronic watthour meter and power-associated quantity calculation circuit |
| 04/27/2004 | US6728646 Energy information system and sub-measurement board for use therewith |
| 04/22/2004 | US20040078154 Method and apparatus for reading and controlling utility consumption |
| 04/21/2004 | CN1491361A Measuring circuit arrangement for electricity meters for direct connection |
| 04/15/2004 | US20040073807 Electronic device and timer therefor with tamper event time stamp features and related methods |
| 04/15/2004 | DE19627989B4 Schaltungsanordnung zum Konstanthalten einer an einen Lastwiderstand abgegebenen Leistung Circuitry for maintaining a power delivered to a load resistor |
| 04/15/2004 | DE10295964T5 Leistungsdetektor mit grösserem Erfassungsbereich Power detector with a larger detection area |
| 04/14/2004 | CN2611909Y Reactive power measuring circuit based on digit integration for carrying out phase shift |
| 04/08/2004 | DE202004000858U1 Stromzähleranordnung An electricity meter arrangement |
| 04/07/2004 | EP1405088A1 Electrical utility meter having harmonic data templates for power quality alarm thresholds |
| 04/07/2004 | EP1405086A1 Power detection circuit for use in a power amplifier |
| 04/07/2004 | CN1487299A Apparatus and method for measuring power consmption |
| 04/07/2004 | CN1145036C Signal power measuring equipment |
| 04/01/2004 | US20040061506 Method for evaluating a measuring signal and corresponding circuit arrangement |
| 03/31/2004 | EP1402494A2 Energy history buffer |
| 03/31/2004 | CN2609276Y Speed-regulating switch of electric tool capable of display instant power |
| 03/31/2004 | CN1144056C Tester of ultrashort-wave therapeutic apparatus |
| 03/30/2004 | US6714000 Method for monitoring power and current flow |
| 03/30/2004 | US6713997 Power metering module |
| 03/25/2004 | US20040059469 Phasor transducer apparatus and system for protection, control, and management of electricity distribution systems |
| 03/25/2004 | US20040057495 Microwave power sensor and method for manufacturing the same |
| 03/25/2004 | US20040056668 MEMS varactor for measuring RF power |
| 03/25/2004 | DE10010545B4 Berechnungssystem für elektrische Leistung Calculation system for electric power |
| 03/17/2004 | EP1398638A1 Power measurement apparatus and method thereof |
| 03/17/2004 | CN1142440C 90-deg phose-lock phase shifter for measuring true reactive power |
| 03/11/2004 | US20040046543 Apparatus for and method of measuring power consumption |
| 03/11/2004 | US20040046542 Power measurement apparatus and method thereof |
| 03/11/2004 | US20040046455 Electrical energy saving system |
| 03/10/2004 | EP1396728A2 Device for measuring a power consumption |
| 03/10/2004 | CN2606358Y Transmission type microwave signal sampling and measuring devices |
| 03/09/2004 | US6703824 Low-cost power measurement device for a plurality of motors |
| 03/09/2004 | US6703823 Method and apparatus for electronic meter testing |
| 03/03/2004 | EP1393083A1 Utility usage rate monitor |
| 03/03/2004 | CN1479423A Low voltage digital relay |
| 03/02/2004 | US6701298 Computerized management system and method for energy performance evaluation and improvement |
| 03/02/2004 | US6701263 Method and apparatus for displaying electric power elements for video display appliance |
| 02/26/2004 | WO2004017079A2 Method and apparatus for obtaining power computation parameters |
| 02/26/2004 | US20040036464 Loss measurement system |
| 02/26/2004 | DE3933707B4 Schaltung zum Kompensieren zeitlicher Instabilitäten der Multiplikationsschaltung mit Hall-Sensoren in einem Wattmeter oder Elektrizitätszähler Circuit to compensate temporal instabilities of the multiplication circuit with Hall sensors in a watt meter or electricity meter |
| 02/24/2004 | CA2269688C Electrical energy meter oscillator compensation |
| 02/19/2004 | US20040032357 Method and apparatus of obtaining power computation parameters |
| 02/18/2004 | CN1475808A Power position detecting circuit |
| 02/18/2004 | CN1138983C Method and apparatus for electronic meter testing |
| 02/17/2004 | US6694270 Phasor transducer apparatus and system for protection, control, and management of electricity distribution systems |
| 02/05/2004 | US20040021456 Apparatus for metering at least one type of electrical power over a predetermined range of service voltages |
| 02/05/2004 | US20040021455 Apparatus and method for monitoring power and current flow |
| 02/03/2004 | US6687627 Electric charge storage apparatus and method for an intelligent electronic device |
| 01/29/2004 | DE19613732B4 Verfahren zum Erzeugen eines einer elektrischen Blindleistung proportionalen Meßsignals A method of generating a reactive power of an electrical measurement signal proportional |
| 01/28/2004 | CN1136459C Method and apparatus for detecting out-of-step in electric power system |
| 01/27/2004 | US6683471 Power detector using FET transistor |
| 01/22/2004 | WO2004008414A1 Data communication network for utility meters |
| 01/15/2004 | US20040008023 Real-time charging electronic watthour meter |
| 01/15/2004 | US20040008019 Method and apparatus for electronic meter testing |
| 01/14/2004 | CN1468376A Rf power measurement |
| 01/14/2004 | CN1467507A Main path sampling type multi-port network |
| 01/13/2004 | US6677850 Layered current sensor |
| 01/13/2004 | US6677785 Power level detection circuit |
| 01/08/2004 | US20040006439 Method and apparatus for reading and controlling utility consumption |
| 01/07/2004 | EP1379012A1 Integrated and automated water, gas and electricity meter reading via power line carrier |
| 01/07/2004 | EP1378756A2 Digital circuit for measuring of power |
| 01/06/2004 | US6675071 Power quality utility metering system having waveform capture |
| 01/01/2004 | US20040002823 Method and apparatus for compiler assisted power management |
| 12/30/2003 | US6671636 Apparatus, method and article of manufacture for utility monitoring |
| 12/24/2003 | WO2002001605A3 Energy history buffer |
| 12/23/2003 | US6667692 Electrical utility meter having harmonic data templates for power quality alarm thresholds |
| 12/16/2003 | US6665620 Utility meter having primary and secondary communication circuits |
| 12/11/2003 | WO2003055031A3 System for the remote data acquisition and control of electric energy meters |
| 12/03/2003 | CN2589997Y Intelligent limit electric energy metering equipment |
| 12/02/2003 | US6657425 Power measurement circuit including harmonic filter |
| 12/02/2003 | US6657424 DC load detection in an electric utility meter |
| 11/20/2003 | US20030216878 Electrical power sensing |
| 11/20/2003 | US20030214309 RF power sensor for measuring an RF signal power using capacitance |
| 11/19/2003 | CN1456897A Power electric energy meter of 1/4 digital squre multiplier |
| 11/19/2003 | CN1128367C Electric energy metering controller for oil pumping machine |
| 11/19/2003 | CN1128366C Microbridge structured thermalcouple type microwave power sensor |
| 11/12/2003 | EP1360512A1 Compensation circuit for the phase shift in electric meters for direct connection |
| 11/12/2003 | CN1455261A Radio-frequency power sensor using capacitance to measure radio frequency signal power |
| 11/05/2003 | EP1358495A1 Power metering module |
| 11/05/2003 | EP1358494A1 Electrical energy saving system |
| 11/05/2003 | EP1358493A1 Measuring circuit arrangement for electricity meters for direct connection |
| 11/05/2003 | EP1358490A1 Method for evaluating a measuring signal and corresponding circuit arrangement |
| 11/05/2003 | CN1454317A Electronic power meter with phase and non-linearity compensation |
| 11/05/2003 | CN1453750A Radio communication type comprehensive power distribution measuring and recording instrument |
| 11/05/2003 | CN1453591A Simple multiplying circuit for power measurement |
| 11/04/2003 | CA2299044C Method and apparatus for automatically controlled gain switching of monitors |
| 10/29/2003 | CN2583683Y Electric power monitoring meter |
| 10/28/2003 | CA2232906C A two-element energy meter having systems for automatic service type detection |
| 10/23/2003 | WO2001001159A8 High function, user configurable electricity meter |
| 10/22/2003 | EP1355162A1 RF power sensor for measuring an RF signal power using capacitance |
| 10/22/2003 | CN1450741A Measnving device and method thereof |
| 10/21/2003 | US6636030 Revenue grade meter with high-speed transient detection |
| 10/21/2003 | US6636028 Electronic electricity meter configured to correct for transformer inaccuracies |
| 10/14/2003 | US6633237 Methods and apparatus for data transfer in electronic energy meters |
| 10/09/2003 | US20030191595 Measuring apparatus and method therefor |
| 10/08/2003 | EP1351148A2 Power profiling system and method for correlating runtime information |
| 10/08/2003 | EP1351064A1 Measuring apparatus comprising spectrum analyser and method therefor |
| 10/08/2003 | CN2578837Y Three-phase kilowatt meter |
| 10/07/2003 | CA2163181C Apparatus providing protection and metering in an ac electrical system utilizing a multi-function sampling technique |
| 10/02/2003 | WO2003081264A1 Electronic watthour meter and power-associated quantity calculating circuit |
| 10/02/2003 | US20030187596 Digital circuit for measuring the power of a signal |