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Class Information
Number: 324/657
Name: Electricity: measuring and testing > Impedance, admittance or other quantities representative of electrical stimulus/response relationships > Lumped type parameters > Using inductive type measurement > Including a comparison or difference circuit > Using a bridge circuit
Description: Subject matter including a multi-terminal network using comparison or balance.

Patents under this class:

Patent Number Title Of Patent Date Issued
8599029 Electrical circuit identification means Dec. 3, 2013
8587327 Cable installation using induction Nov. 19, 2013
8471569 Method and circuit arrangement for measurement of the current through an inductive load Jun. 25, 2013
7598752 Charge transfer device and method, touch sensing device and method Oct. 6, 2009
7126347 Precision wideband 50 Ohm input and 50 Ohm output or 100 Ohm output differential reflection bridge Oct. 24, 2006
6551233 Magnetic stimulator power and control circuit Apr. 22, 2003
6546795 Wireless liquid level sensing system and method Apr. 15, 2003
6489787 Gas detection circuit Dec. 3, 2002
6028413 Charging device for batteries in a mobile electrical device Feb. 22, 2000
5898302 Residual stress measurements in metal objects using four coils Apr. 27, 1999
5889406 Inductance-change detection apparatus Mar. 30, 1999
5523959 Ice detector and deicing fluid effectiveness monitoring system Jun. 4, 1996
5444381 Measuring circuit for impedance values particularly for use with inductive displacement transmitters Aug. 22, 1995
5225784 DC Current comparator circuit for generating an adjustable output proportional to an input signal Jul. 6, 1993
5132617 Method of measuring changes in impedance of a variable impedance load by disposing an impedance connected coil within the air gap of a magnetic core Jul. 21, 1992
5045786 Circuit for measuring a variable inductance connected in series with a fixed inductance Sep. 3, 1991
4528498 Frequency compensating current circuit for a current comparator capacitance bridge Jul. 9, 1985
4477772 Frequency compensator for a current-comparator capacitance bridge Oct. 16, 1984
4210867 Induction coil method for detecting underground flame fronts Jul. 1, 1980

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