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Class Information
Number: 307/89
Name: Electrical transmission or interconnection systems > Anti-induction or coupling to other systems
Description: Subject matter relating to systems which prevent induction or coupling to other systems.

Sub-classes under this class:

Class Number Class Name Patents
307/90 Inducing current control 17
307/91 Magnetic or electrostatic field control (e.g., shielding) 125

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8461667 Semiconductor device Jun. 11, 2013
8415835 Plug-in power line conditioner Apr. 9, 2013
8299649 Passive audio/video component unbalanced network to balanced network adapter Oct. 30, 2012
8228019 Output filter and motor drive system including the same Jul. 24, 2012
8212413 Circuit assembly for gating a power semiconductor switch Jul. 3, 2012
8148908 Power supply control device for lamp Apr. 3, 2012
8080903 Power supply circuit for SATA control chip Dec. 20, 2011
7964993 Network devices with solid state transformer and class AB output stage for active EMI suppression and termination of open-drain transmit drivers of a physical device Jun. 21, 2011
7948395 Downhole transmission system comprising a coaxial capacitor May. 24, 2011
7579715 Device and method for transmitting and providing the power of capacitive actuators Aug. 25, 2009
7501721 Reduced-noise switching power supply Mar. 10, 2009
7452246 Methods and apparatus for reducing crosstalk in electrical connectors Nov. 18, 2008
7098647 Coaxial cable unit, test apparatus, and CPU system Aug. 29, 2006
7039360 External noise intrusion prevention device, signal amplifier, protector and antenna plug May. 2, 2006
6998964 Splitter Feb. 14, 2006
6873065 Non-optical signal isolator Mar. 29, 2005
6720677 Power lines and apparatus using the same Apr. 13, 2004
6710473 Current conducting part of a power transmission line Mar. 23, 2004
6700223 Active booster transformer system Mar. 2, 2004
6600243 Battery pack and an information processing device in which the battery pack is detachable/attachable Jul. 29, 2003
6590494 Electronic device Jul. 8, 2003
6570271 Apparatus for routing signals May. 27, 2003
6566767 Selectable make-brake ground connector, cable and/or system May. 20, 2003
6492746 Current system for compensating the magnetic field produced by electric traction railways Dec. 10, 2002
6462435 Cable detect and EMI reduction apparatus and method Oct. 8, 2002
6410996 Radioshielded assembly Jun. 25, 2002
6400044 Protective arrangement for electronic functional units and/or functional groups Jun. 4, 2002
6323564 Circuit configuration with reduced EMI Nov. 27, 2001
6317031 Power line communications Nov. 13, 2001
6297965 Wiring arrangement including capacitors for suppressing electromagnetic wave radiation from a printed circuit board Oct. 2, 2001
6291907 Magnetically coupled signal isolator using a faraday shielded MR or GMR receiving element Sep. 18, 2001
6249062 Method and apparatus of pseudogrounding Jun. 19, 2001
6121827 Digital noise reduction in integrated circuits and circuit assemblies Sep. 19, 2000
6091165 Method and apparatus to reduce peak electro-magnetic emissions from ground and power planes Jul. 18, 2000
6054780 Magnetically coupled signal isolator using a Faraday shielded MR or GMR receiving element Apr. 25, 2000
6037678 Coupling communications signals to a power line Mar. 14, 2000
6013957 Arrangement for reducing the electromagnetic field created by power electronic equipment Jan. 11, 2000
5965956 Overhead line for electric energy transmission Oct. 12, 1999
5869909 Active ground compensation Feb. 9, 1999
5703416 Electromagnetic compatibility for integrated circuit pins and internal nodes Dec. 30, 1997
5635772 Method and apparatus for transferring between electrical power sources which adaptively blocks transfer until load voltage decays to safe value Jun. 3, 1997
5619079 EMI line filter Apr. 8, 1997
5610452 E-beam high voltage switching power supply Mar. 11, 1997
5548082 Passive signal shielding structure for short-wire cable Aug. 20, 1996
5536978 Net current control device Jul. 16, 1996
5521521 Testing contactor for small-size semiconductor devices May. 28, 1996
5391928 Switching circuit having a reduced output impedance Feb. 21, 1995
5386148 Signal conditioning apparatus Jan. 31, 1995
5379181 Smoothing device for a power supply Jan. 3, 1995
5365115 Method and apparatus for mitigation of magnetic fields from low frequency magnetic field sources Nov. 15, 1994

1 2

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