| Patents for G01R 21 - Arrangements for measuring electric power or power factor (6,609) |
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| 03/31/2005 | US20050068192 System for the remote acquisition of the electric energy consumptions and for the remote control of the distributed targets of users, also of domestic type |
| 03/30/2005 | CN1601284A Multicircuit type instrument and split type current transformer for use in measurement thereof |
| 03/30/2005 | CN1195232C Simple multiplying circuit for power measurement |
| 03/30/2005 | CN1195231C Automatic eliminating method for self d.c. component in power metering system |
| 03/29/2005 | US6873144 Electronic meter having random access memory with passive nonvolatility |
| 03/24/2005 | US20050065743 Methods and apparatus for retrieving energy readings from an energy monitoring device |
| 03/23/2005 | CN1598600A Indirect heating terminal type microwave power micro-mechanical sensor and preparation method thereof |
| 03/22/2005 | US6871150 Expandable intelligent electronic device |
| 03/16/2005 | EP1515146A1 Current inductive sensor |
| 03/16/2005 | CN1595177A Method for measuring maximum and minimum electrical energy depletion in medium voltage power distribution network |
| 03/10/2005 | WO2005022171A2 Method and apparatus for measuring impedance of electrical component under high interference conditions |
| 03/09/2005 | CN2684200Y Programmable digital display electrical measuring meter |
| 03/09/2005 | CN1591027A Multicircuit type instrument and split type current transformer for use in measurement thereof |
| 03/08/2005 | US6864674 Loss measurement system |
| 03/03/2005 | US20050046409 Systems and methods for performing RF power measurements |
| 03/02/2005 | CN1588099A Direct heating terminal type micro electronic mechanical system microwave power sensor and its producing method |
| 03/02/2005 | CN1588098A On-line microwave power micro mechanical sensor and its producing method |
| 02/24/2005 | WO2004105239A3 Efficient coupler detector circuit with reduced harmonic distortion |
| 02/24/2005 | WO2004088858A3 Method and apparatus for improved data transmission |
| 02/24/2005 | US20050044438 Trace data processing apparatus and method |
| 02/24/2005 | US20050043925 Predictive failure analysis and failure isolation using current sensing |
| 02/24/2005 | US20050043909 Method for measuring integrated circuit processor power demand and associated system |
| 02/24/2005 | US20050042995 High frequency signal detector |
| 02/23/2005 | CN1190666C RF Power measurement |
| 02/16/2005 | CN1582396A High frequency detection method and high frequency detection circuit |
| 02/15/2005 | US6856793 Method and apparatus for measuring output power of devices for mobile communications |
| 02/10/2005 | WO2005012927A1 Dual signal rf power level detector |
| 02/09/2005 | CN1188809C Radio communication type comprehensive power distribution measuring and recording instrument |
| 02/08/2005 | US6853176 Power measurement apparatus and method therefor |
| 02/03/2005 | US20050027464 Revenue meter with power quality features |
| 02/03/2005 | US20050024234 Reduced cost automatic meter reading system and method using locally communicating utility meters |
| 02/03/2005 | US20050024013 Battery load power detecting system |
| 02/02/2005 | EP1108220A4 High function, user configurable electricity meter |
| 01/27/2005 | WO2005008181A2 Methods and apparatus for monitoring power flow in a conductor |
| 01/27/2005 | US20050021252 Power protector controllable via internet |
| 01/27/2005 | CA2532984A1 Methods and apparatus for monitoring power flow in a conductor |
| 01/26/2005 | CN2674461Y Single-phase electronic type prepayment watt-hour meter |
| 01/25/2005 | US6847201 Compensation circuit for the phase shift in electric meters for direct connection |
| 01/19/2005 | EP1498916A1 Integrated circuit provided for a watthour meter |
| 01/19/2005 | CN1568428A Apparatus and method for calculating of three-phase power factor |
| 01/18/2005 | US6844825 Electric energy service apparatus with tamper detection |
| 01/06/2005 | WO2004081588A3 Wiring error detector |
| 01/06/2005 | US20050001610 Electricity meter with multiple gains signal to an A/D converter |
| 01/05/2005 | CN2669551Y Marine special microwave radiometer with anticorrosive property |
| 12/30/2004 | US20040263149 Apparatus and method for monitoring power and current flow |
| 12/29/2004 | EP1322969B1 Rf power measurement |
| 12/28/2004 | US6836105 Apparatus for power measuring receiver |
| 12/23/2004 | WO2004086059A3 System and method for exact compensation of fundamental phasors |
| 12/15/2004 | CN2663992Y An improved constant temperature reference source special for continental rise or on-board microwave radiometer system |
| 12/14/2004 | US6832339 Methods and apparatus for programming a solid-state meter |
| 12/08/2004 | CN1179212C Energy meter with power quality monitoring and diagnostic system |
| 12/08/2004 | CN1179211C Apparatus and method for detecting tampering in multiphase meter |
| 12/07/2004 | US6828771 Electrical power measurement |
| 12/02/2004 | WO2004105239A2 Efficient coupler detector circuit with reduced harmonic distortion |
| 12/02/2004 | US20040243377 Real time power flow method for distribution system |
| 12/01/2004 | CN1178393C Method for deriving and calibrating frequency of pulse signal |
| 11/30/2004 | US6825650 Current measuring probe and electrical energy meter for use therewith |
| 11/25/2004 | WO2004102212A1 Electric power measuring apparatus |
| 11/25/2004 | US20040232904 Methods and apparatus for phase compensation in electronic energy meters |
| 11/24/2004 | CN1549930A Electrical utility meter having harmonic data templates for power quality alarm thresholds |
| 11/18/2004 | US20040229578 Wireless communications system incorporating intelligent electronic devices |
| 11/18/2004 | US20040227503 Power monitoring system |
| 11/18/2004 | US20040227502 Efficient coupler detector circuit with reduced harmonic distortion |
| 11/17/2004 | EP1476765A1 Radio frequency power generation and power measurement |
| 11/17/2004 | EP1476763A1 Radio frequency power measurement |
| 11/17/2004 | EP1476762A1 Signal processing circuit for an optical sensor |
| 11/17/2004 | CN2657011Y Synchronous generator power angle intelligent on-line stable measuring control device |
| 11/16/2004 | US6820222 Apparatus and method for processor power measurement in a digital signal processor using trace data and simulation techniques |
| 11/10/2004 | CN2655250Y One meter system multipurpose power metering monitor for commerce |
| 11/10/2004 | CN2655249Y Apparatus for measuring saving electricity quantity of electricity saver |
| 11/10/2004 | CN1175272C Electronic charging device with automatic installation detection |
| 11/09/2004 | US6816360 Reduced cost automatic meter reading system and method using locally communicating utility meters |
| 11/04/2004 | US20040220766 Method and apparatus for generating an electronic test signal |
| 11/03/2004 | EP1472549A1 Power detector with constant voltage decoupling |
| 11/03/2004 | CN2653519Y Multiple change ratio three-phase powder meter box |
| 11/02/2004 | US6813571 Apparatus and method for seamlessly upgrading the firmware of an intelligent electronic device |
| 11/02/2004 | US6812686 Method of forming an RF detector and structure therefor |
| 10/28/2004 | US20040212400 High-frequency detection method and high-frequency detection circuit |
| 10/28/2004 | DE10311777A1 Electrical power measurement method, e.g. for use in a power calculation engine for measuring three phase power outputs, employs delta signal modulators, low pass digital filters, multiplication and summation steps |
| 10/27/2004 | CN2651757Y Bidirectional metering table for power distribution line |
| 10/14/2004 | WO2004088858A2 Method and apparatus for improved data transmission |
| 10/12/2004 | US6803774 MEMS varactor for measuring RF power |
| 10/12/2004 | US6803754 Power sensor |
| 10/07/2004 | WO2004086059A2 System and method for exact compensation of fundamental phasors |
| 10/07/2004 | WO2004047259A3 Power converter circuitry and method |
| 10/07/2004 | US20040196023 Measuring power of analog signals |
| 10/07/2004 | CA2519345A1 System and method for exact compensation of fundamental phasors |
| 10/05/2004 | US6801146 Sample and hold circuit including a multiplexer |
| 09/30/2004 | US20040189488 System and method for metering electricity supplied to a customer |
| 09/30/2004 | US20040189341 Power-on self test for a computer system |
| 09/30/2004 | DE19957980B4 Elektronischer Elektrizitätszähler Electricity meter |
| 09/29/2004 | CN2645323Y Power distribution load observing and control terminal |
| 09/29/2004 | CN1532552A Power measuring device and its method |
| 09/28/2004 | US6798190 Compact intelligent electronic device incorporating transformers |
| 09/25/2004 | CA2423417A1 System and method for metering electricity supplied to a customer |
| 09/23/2004 | WO2004081588A2 Wiring error detector |
| 09/23/2004 | WO2004061462B1 Power monitoring integrated circuit with communication interface |
| 09/23/2004 | US20040186672 Energy information system and sub-measurement board for use therewith |
| 09/23/2004 | US20040186670 Phasor transducer apparatus and system for protection, control, and management of electricity distribution systems |
| 09/23/2004 | US20040186669 System and method for exact compensation of fundamental phasors |