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Class Information
Number: 361/139
Name: Electricity: electrical systems and devices > Control circuits for electromagnetic devices
Description: Subject matter relating to control circuits for relays and other electromagnetic devices.

Sub-classes under this class:

Class Number Class Name Patents
361/160 For relays or solenoids 465
361/140 Including compensation for thermal change of electromagnetic device 29
361/142 Including housing 44
361/157 Including instrument (e.g., meter-relay) 11
361/159 Including means for using, or compensating for, the induced emf of the electromagnetic device 139
361/141 Including superconductivity 120
361/143 Systems for magnetizing, demagnetizing, or controlling the magnetic field 199

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8693158 Compact electronic reverberation chamber Apr. 8, 2014
8625249 Control apparatus for electromagnetic inductive load Jan. 7, 2014
8614873 Varying electrical current and/or conductivity in electrical current channels Dec. 24, 2013
8576534 Electronic magnetic contactor Nov. 5, 2013
8561594 Internal combustion engine controller Oct. 22, 2013
8531813 Method and system for moving material Sep. 10, 2013
8520356 Relay controller for defined hold current for a relay Aug. 27, 2013
8508905 Coil-driving apparatus of electronic magnetic contactor Aug. 13, 2013
8488292 Magnetic field generating means Jul. 16, 2013
8416551 Starter for thermal engine equipped with electronic control device Apr. 9, 2013
8351177 Method and apparatus for discharging a lifting magnet Jan. 8, 2013
8330713 Touch-sensitive display device with an integrated mechanical operating part for motor vehicles Dec. 11, 2012
8320096 Soft start clutch controller Nov. 27, 2012
8270140 System and method for controlling a set of bi-stable solenoids for electromagnetic locking systems Sep. 18, 2012
8264810 Electrically assisted safing of a linear actuator to provide shock tolerance Sep. 11, 2012
8254077 Solenoid valve driving circuit, solenoid valve, and solenoid valve driving method Aug. 28, 2012
8223469 Power node switching center with active feedback control of power switches Jul. 17, 2012
8219258 Queuing access to a shared power supply Jul. 10, 2012
8213150 Door lock Jul. 3, 2012
8189316 Hydraulic valve control circuit and method for checking the function of a hydraulic valve control circuit May. 29, 2012
8159806 Bistable electromagnetic actuator, control circuit of an electromagnetic actuator with double coil and electromagnetic actuator with double coil comprising one such control circuit Apr. 17, 2012
8154841 Current zero cross switching relay module using a voltage monitor Apr. 10, 2012
8154840 Fuel injector control Apr. 10, 2012
8149556 Power adapter and power supply method thereof Apr. 3, 2012
8144447 Electromagnetic load controller Mar. 27, 2012
8107210 Magnetic actuator system and control method thereof Jan. 31, 2012
8102636 Magnetic field generation device Jan. 24, 2012
8098472 System and method for controlling an electromagnetic field generator Jan. 17, 2012
8040210 Electromagnetically operated switching device Oct. 18, 2011
8040654 Relay controller for controlling an excitation current of a relay Oct. 18, 2011
8022657 Washing machine wiring to reduce mechanical timer contact welding Sep. 20, 2011
8023242 Circuit arrangement with a relay incorporating one field coil as well as switch contacts Sep. 20, 2011
8018708 Magnetic field compensation for vessels Sep. 13, 2011
7992850 System and method for controlling electromagnet lift power for material handlers Aug. 9, 2011
7990744 Power supply saving system for an electronic device Aug. 2, 2011
7961448 Drive control method and unit for micro machine device Jun. 14, 2011
7948730 Fast turn-off and fast turn-on of an inductive load and usage in vehicle application May. 24, 2011
7944104 Magnetic bearing apparatus May. 17, 2011
7944671 Control apparatus and control method of electromagnetic drive valve operating mechanism May. 17, 2011
7936549 State grasp device, and switching control device of power switching apparatus employing the state grasp device May. 3, 2011
7923971 Non-contact electric power transmission apparatus Apr. 12, 2011
7872845 Control system Jan. 18, 2011
7864499 Switching power supply saving system Jan. 4, 2011
7840365 Integrated circuit arrangement for current regulation Nov. 23, 2010
7834865 Rotary actuator Nov. 16, 2010
7821760 Counter electromotive force prevention unit Oct. 26, 2010
7778002 Method and apparatus to reduce ring out in an ignition coil to allow for ion sense processing Aug. 17, 2010
7746619 Soft start clutch controller Jun. 29, 2010
7679248 Magnetic bearing system Mar. 16, 2010
7663857 Load driver circuit and ignition device using the same Feb. 16, 2010

1 2 3 4

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