| Patents for G01R 21 - Arrangements for measuring electric power or power factor (6,609) |
|---|
| 08/13/1997 | CN1156828A Vector electricity meters and associated vector electricity metering methods |
| 08/12/1997 | US5657237 Instrument and method for the digital electronic measurement of periodic electrical quantities |
| 08/12/1997 | US5656929 Method and apparatus for measuring RF power in a test set |
| 08/07/1997 | WO1997021106A3 Electronic measurement device |
| 08/06/1997 | EP0787994A1 Electricity meter |
| 08/06/1997 | EP0787304A1 Numerical comparator |
| 07/29/1997 | US5652505 Power consumption measurement device for a multiphase alternating current system |
| 07/22/1997 | US5650936 Power monitor apparatus and method with object oriented structure |
| 07/22/1997 | US5650771 Electrical socket with monitoring unit for monitoring operating conditions |
| 07/17/1997 | WO1997025625A1 Transient event detector for monitoring electrical loads |
| 07/16/1997 | EP0783786A1 Graphical display for an energy management device |
| 07/09/1997 | EP0783111A2 Electrical heating control device |
| 07/01/1997 | US5644243 Detector power linearity requirements and verification techniques for TMI direct detection receivers |
| 06/18/1997 | EP0779516A1 Thermoelectric sensor intended to measure the true effective current |
| 06/18/1997 | CN1152129A Electronic prepayment type electric watt-hour meter |
| 06/12/1997 | WO1997021106A2 Electronic measurement device |
| 06/11/1997 | CN1151527A Opto-electronic demand meter using optical metering outfit |
| 06/04/1997 | EP0777125A2 Vector electricity meters and associated vector electricity metering methods |
| 05/27/1997 | CA2085527C Microwave power detecting device |
| 05/21/1997 | CN2254555Y Computer intelligent card fee-collecting device for piping gas |
| 05/20/1997 | US5631843 Programmable electrical energy meter and methods therefor |
| 05/20/1997 | US5631554 Electronic metering device including automatic service sensing |
| 05/14/1997 | CN2254191Y Light beam and digit double display installation type KWH meter |
| 05/07/1997 | EP0772052A1 Improvements in or relating to electricity meters |
| 05/06/1997 | US5627760 Method and apparatus for real time recursive parameter energy management system |
| 05/06/1997 | US5627718 Apparatus providing protection and metering in an ac electrical system utilizing a multi-function sampling technique |
| 05/06/1997 | US5627462 Apparatus and method for measuring power demand from conventional watt-hour utility meters |
| 04/30/1997 | CN1034772C Method for solving the contradition between watt-hour operation precision and speed in digit electronic watt-hour meter |
| 04/22/1997 | US5623201 3-phase power meter having a display board |
| 04/17/1997 | DE19539547A1 Electronic meter for measuring electric work as power consumed by electric unit |
| 04/16/1997 | EP0666480A4 Power-frequency converter (and variations thereof). |
| 04/16/1997 | CN2252343Y Intelligence distribution transformer operation parameter test instrument |
| 04/15/1997 | US5621629 Switching power supply for use in an electronic energy meter having a wide range of input voltages |
| 04/08/1997 | US5619192 Apparatus and method for reading utility meters |
| 04/01/1997 | US5617286 Circuit breaker having data recording |
| 04/01/1997 | US5617020 Microelectromechanical-based power meter |
| 03/27/1997 | DE19605653C1 Electricity meter with digital signal processor |
| 03/26/1997 | WO1998003880A1 Electronic metering device including automatic service sensing |
| 03/25/1997 | US5614817 Method and device for determining the real power of a DC electrical drive |
| 03/23/1997 | CA2184766A1 Current sensor |
| 03/19/1997 | CN2249907Y Electronic card single phase watt meter |
| 03/13/1997 | WO1997009626A1 Electricity meter |
| 03/13/1997 | CA2231053A1 Electricity meter |
| 03/12/1997 | EP0761032A1 Electricity monitoring system |
| 03/06/1997 | DE19532588C1 Elektrizitätszähler Electricity meters |
| 03/06/1997 | DE19531772A1 Digital power consumption meter esp. electricity meter |
| 02/25/1997 | US5606510 High speed power analyzer |
| 02/20/1997 | WO1997006442A1 Measurement apportionment system |
| 02/20/1997 | CA2229047A1 Measurement apportionment system |
| 02/13/1997 | WO1997005493A1 Thermoelectric measurement converter |
| 02/13/1997 | DE19526723C1 Elektrizitätszähler Electricity meters |
| 02/06/1997 | WO1997004321A1 Electricity meter |
| 02/06/1997 | CA2227288A1 Electricity meter |
| 02/05/1997 | CN1142264A Measuring process for measuring chargeable electrical consumption from an electrical network and electronic electricity meter |
| 02/04/1997 | US5600527 Circuit interrupter providing protection and waveform capture for harmonic analysis |
| 01/29/1997 | EP0756177A2 Appliance for measuring electrical energy |
| 01/29/1997 | EP0756156A2 Method for the automatic acquisition of data displayed on a counter, for test or calculation purposes |
| 01/23/1997 | DE19627989A1 Multiplying circuit for variable resistive load power measurement e.g. of plasma arc |
| 01/08/1997 | EP0752589A1 Electricity meter |
| 01/08/1997 | CN2244729Y Electromechanical reactive power display apparatus |
| 12/31/1996 | US5590179 Remote automatic meter reading apparatus |
| 12/31/1996 | US5589764 Electric power meter |
| 12/24/1996 | US5587917 Data collection and processing for digital AC power system monitor/analyzer |
| 12/19/1996 | WO1996041201A1 Microelectromechanical-based power meter |
| 12/17/1996 | US5585716 Multiple stage frequency modulated circuit |
| 12/12/1996 | WO1996039633A1 Method and apparatus for driving a digital multimeter having a function of a wattmeter |
| 12/12/1996 | DE19520781A1 Wave guide detector with integrated HF antenna element feeding detector diode |
| 12/11/1996 | EP0554424B1 Method for identifying electrical power consumers on a circuit being monitored |
| 12/05/1996 | DE19519938A1 Opto-electronic performance measurement at continuously summating consumption meters |
| 12/04/1996 | EP0746183A1 An electronic device for accurate identification at distance of malfunctions in lamps |
| 12/03/1996 | US5581471 Method and apparatus for storing electric power measurements |
| 11/21/1996 | WO1996021264A3 Energy management and building automation system |
| 11/19/1996 | US5576618 Process and apparatus for comparing in real time phase differences between phasors |
| 11/13/1996 | EP0742649A2 Directional coupler arrangement for the measurement of power |
| 11/13/1996 | EP0742444A2 Improvements in or relating to electricity meters |
| 11/13/1996 | EP0742443A2 Improvements in or relating to electricity meters |
| 11/13/1996 | EP0742442A2 Improvements in or relating to modulised utility meters |
| 11/13/1996 | EP0741872A1 Energy distributing system |
| 11/12/1996 | US5574380 Current measurement circuit comprising a mutually coupled transformer and an integration circuit |
| 11/12/1996 | US5574362 Electrical energy measuring and metering device |
| 11/05/1996 | US5572438 Engery management and building automation system |
| 10/30/1996 | EP0739489A1 Measuring process for measuring chargeable electrical consumption from an electrical network and electronic electricity meter |
| 10/23/1996 | EP0738895A2 Electronic watthour meter |
| 10/23/1996 | EP0738893A2 Synchronous detector circuit arrangement |
| 10/17/1996 | DE19513534A1 Measuring electrical power consumption for single or multi-phase AC supplies |
| 10/10/1996 | WO1996031784A1 Thermoelectric sensor intended to measure the true effective current |
| 10/09/1996 | CN1132858A Electrical metering system having electrical meter and external current sensor ensor |
| 10/08/1996 | US5563506 Electricity meters using current transformers |
| 10/02/1996 | EP0676054B1 Process and device for finding the real output of an electric drive |
| 09/19/1996 | WO1996028740A1 Electricity meter |
| 09/19/1996 | WO1996028739A1 Electricity measurement apparatus |
| 09/19/1996 | WO1996028738A1 Electricity measurement apparatus |
| 09/11/1996 | EP0731359A2 Graphical display for an energy management device |
| 09/10/1996 | US5555508 Programmable electrical energy meter and methods therefor |
| 09/10/1996 | US5554927 Electrical quantity measurement device |
| 08/29/1996 | DE19526870C1 Watt-hour meter having two modules measuring by different principles, for measuring electrical power consumption |
| 08/27/1996 | US5550526 Thermal detection elements with heater |
| 08/20/1996 | US5548527 Programmable electrical energy meter utilizing a non-volatile memory |
| 08/20/1996 | US5548523 Monitoring device secured to power distribution system conductors |
| 08/20/1996 | US5548209 Solid state electric power usage meter and method for determining power usage |