G01R - Measuring electric variables; Measuring magnetic variables

More topics under "G01R - Measuring electric variables; Measuring magnetic variables" (357,211)
G01R 1 - Details of instruments or arrangements of the types covered by groups or (27,269)
G01R 11 - Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption (8,227)
G01R 13 - Arrangements for displaying electric variables or waveforms (5,418)
G01R 15 - Details of measuring arrangements of the types provided for in groups , or (13,411)
G01R 17 - Measuring arrangements involving comparison with a reference value, e.g. bridge (1,558)
G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850)
G01R 21 - Arrangements for measuring electric power or power factor (6,609)
G01R 22 - Arrangements for measuring time integral of electric power or current, e.g. electricity meters (4,127)
G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503)
G01R 25 - Arrangements for measuring phase angle between a voltage and a current or between voltages or currents (2,594)
G01R 27 - Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom (22,286)
G01R 29 - Arrangements for measuring or indicating electric quantities not covered by groups (11,937)
G01R 3 - Apparatus or processes specially adapted for the manufacture of measuring instruments (2,138)
G01R 31 - Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere (152,264)
G01R 33 - Arrangements or instruments for measuring magnetic variables (52,887)
G01R 35 - Testing or calibrating of apparatus covered by the other groups of this subclass (8,105)
G01R 5 - Instruments for converting a single current or a single voltage into a mechanical displacement (553)
G01R 7 - Instruments capable of converting two or more currents or voltages into a single mechanical displacement (437)
G01R 9 - Instruments employing mechanical resonance (38)

Patents for G01R - Measuring electric variables; Measuring magnetic variables (453)
02/1995
02/28/1995	US5394089 Battery monitor which indicates remaining capacity by continuously monitoring instantaneous power consumption relative to expected hyperbolic discharge rates
01/1995
01/18/1995	CN1027470C Integrated poly-phase power meter
11/1994
11/16/1994	CN1026616C 发送器 Transmitter
03/1994
03/29/1994	CA2106246A1 Electrical test arrangement and apparatus
02/1994
02/22/1994	US5289123 Detection of defects in food by detecting pattern of current flow
11/1993
11/18/1993	EP0569363A1 Nmr frequency locking circuit
11/18/1993	EP0569354A1 Battery with strength indicator
07/1993
07/22/1993	WO1993014400A1 Method and apparatus for detection of defects in food
07/22/1993	CA2127798A1 Method and apparatus for detection of defects in food
03/1993
03/31/1993	EP0303615B1 Measurement circuit
11/1992
11/24/1992	US5166620 Nmr frequency locking circuit
09/1992
09/30/1992	CN1064947A Measurement circuit
09/09/1992	EP0501952A1 Battery monitoring system.
07/1992
07/29/1992	WO1992013368A1 Battery with strength indicator
06/1992
06/17/1992	CN1017091B Detetor for electronically detecting defect of cause loss for electric-energy in d.c. transmission lines
05/1992
05/29/1992	WO1992008996A1 Nmr frequency locking circuit
05/19/1992	CA1301249C Integrated poly-phase power meter
04/1992
04/08/1992	CN1016217B Generator circuit
03/1992
03/10/1992	CA1296923C Measurement circuit
10/1991
10/23/1991	CN1014467B Device for detecting current
06/1991
06/13/1991	WO1991008494A1 Battery monitoring system
05/1991
05/22/1991	CA2030445A1 Measuring value converter or connection arrangement
05/14/1991	US5015544 Battery with strength indicator
10/1989
10/18/1989	CN1036458A Device for detecting current
09/1989
09/20/1989	EP0225337B1 Device for the detection of corona discharges in alternating current overhead lines
06/1989
06/07/1989	CN1033322A Integrated poly-phase power meter
06/06/1989	CA1255359A1 Control apparatus for the electronic detection in alternating current transmission lines of fault locations causing power losses
03/1989
03/29/1989	EP0294449A4 Computer-aided probe with tri-state circuitry test capability.
02/1989
02/22/1989	EP0303615A1 Measurement circuit.
12/1988
12/19/1988	EP0303615A4 Measurement circuit.
12/14/1988	EP0294449A1 Computer-aided probe with tri-state circuitry test capability
10/1988
10/18/1988	US4779042 Computer-aided probe with tri-state circuitry test capability
10/04/1988	US4775839 Control apparatus for the electronic detection in a.c. power transmission lines of fault locations causing power losses
08/1988
08/03/1988	EP0135512B1 Improved method and means of determining coefficients for linear predictive coding
07/1988
07/06/1988	CN87108371A Computer-aided probe with tri-state circuitry test capability
06/1988
06/30/1988	WO1988004781A1 Computer-aided probe with tri-state circuitry test capability
04/1988
04/13/1988	CN87102941A Measurement circuit
11/1987
11/05/1987	WO1987006711A1 Measurement circuit
09/1987
09/01/1987	CA1226330A1 Method and apparatus for determining the flux vector of a rotating-field machine from the stator current and the stator voltage, and the application thereof
06/1987
06/16/1987	EP0225337A1 Device for the detection of corona discharges in alternating current overhead lines.
03/1987
03/17/1987	US4651086 Apparatus and method for determining the resistance of a coil connection of an electric motor winding
12/1986
12/04/1986	WO1986007160A1 Device for the detection of corona discharges in alternating current overhead lines
11/1986
11/19/1986	CN86103460A Detector for electronially detecting defect of cause loss for electric-energy in the d.c. transmission lines
11/1985
11/27/1985	EP0162522A2 Apparatus and method for measuring the coil resistance and the connection resistance between the winding and commutator bars in electric motors
06/1985
06/10/1985	EP0135512A4 Improved method and means of determining coefficients for linear predictive coding.
04/1985
04/03/1985	EP0135512A1 Improved method and means of determining coefficients for linear predictive coding.
07/1984
07/19/1984	WO1984002814A1 Improved method and means of determining coefficients for linear predictive coding
12/1982
12/15/1982	EP0066583A1 Method for measuring the partial pressure of a gas and probe for implementing such method
06/1982
06/24/1982	WO1982002093A1 Method for measuring the partial pressure of a gas and probe for implementing such method
07/1980
07/08/1980	CA1081343A1 Float detecting device for pressurized slurry transfer apparatus
03/1980
03/25/1980	CA1074426A1 Means for identifying subscriber lines
06/1979
06/26/1979	US4159402 Means for identifying subscriber lines
08/1976
08/31/1976	US3977508 Device for recognizing a category of coins

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