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Class Information
Number: 379/55.1
Name: Telephonic communications > Having near field link (e.g., capacitive, inductive)
Description: Subject matter having a transceiver, a base station, and a limited range system (i.e., field strength=k/d where k is a constant and d=distance between the transceiver and base station antennas) whereby signal transfer is inductive or capacitive, rather than electromagnetic.

Patents under this class:

Patent Number Title Of Patent Date Issued
8606177 Apparatus and method for controlling human body contact of ground electrode, and human body communication system using the same Dec. 10, 2013
8139802 Hearing apparatus having coils arranged orthogonal to one another Mar. 20, 2012
8111041 Power transmission control device, power reception control device, non-contact power transmission system, power transmission device, power reception device, and electronic instrument Feb. 7, 2012
7986916 Demodulation communication signals in a near field radio frequency (RF) communicator Jul. 26, 2011
7864928 Infrared communication receiver Jan. 4, 2011
7580509 Telephone hook switch using non-contact capacitive sensor and telephone using the same Aug. 25, 2009
7421246 Wireless communication device and a method for controlling the same Sep. 2, 2008
7224992 Four pole stereo headset with push to talk capability in a duplex radio May. 29, 2007
6925315 Telephone handset with thumb-operated tactile keypad Aug. 2, 2005
6880761 Method for loading data onto chip cards and devices adapted thereto Apr. 19, 2005
6477502 Method and apparatus for using non-symmetric speech coders to produce non-symmetric links in a wireless communication system Nov. 5, 2002
6223018 Intra-body information transfer device Apr. 24, 2001
6154635 Antenna driving device for transponder Nov. 28, 2000
6091779 Process for the wireless transmitting of energy and data Jul. 18, 2000
6031492 Mobile cradle antenna and heat sink enhancement Feb. 29, 2000
5995591 Connecting arrangement for reducing induced noise Nov. 30, 1999
5949291 Cordless telephone with digital frequency adjustment Sep. 7, 1999
5940447 Wireless powered communication device using power signal sampling and method Aug. 17, 1999
5809429 Radiating coaxial cable and radio communication system using same Sep. 15, 1998
5625883 System for wireless information transmission between two different rooms Apr. 29, 1997
5329576 Wireless communication zone management system Jul. 12, 1994
5293400 Contactless linking device for interconnecting data bus sections Mar. 8, 1994
5257290 Transmission line termination of guide-communications wire for guided vehicles Oct. 26, 1993
5247575 Information distribution system Sep. 21, 1993
5230085 Method and apparatus for wireless electromagnetic communication within a contained electromagnetic field Jul. 20, 1993
5115463 Extended cordless telephone system May. 19, 1992
4993060 Portable device for use by a news reporter Feb. 12, 1991
4918745 Multi-channel cochlear implant system Apr. 17, 1990
4908869 Induction-based assistive listening system Mar. 13, 1990
4866732 Wireless telephone system Sep. 12, 1989
4792965 Oscillator system for detecting a selected one of a plurality of tuned circuits Dec. 20, 1988
4747158 Cordless communications system May. 24, 1988
4736452 Core coupled transmitter/receiver loops for connectorless entertainment systems Apr. 5, 1988
4697283 Telephone handset with integrated flux coil Sep. 29, 1987
4694292 Digitized decoder-receiver for receiving call signal Sep. 15, 1987
4602255 Luggage door unlocking device for vehicle Jul. 22, 1986
4584707 Cordless communications system Apr. 22, 1986
4528677 Data transmission system Jul. 9, 1985
4462113 Cordless transmitting and receiving apparatus Jul. 24, 1984
4352200 Wireless aircraft passenger audio entertainment system Sep. 28, 1982
4301335 Visual telephone or other annuciator ringing indicator Nov. 17, 1981
4117271 Inductive communication system Sep. 26, 1978
4101835 Method and electronic control device for radio telephone communication Jul. 18, 1978
3967201 Wireless subterranean signaling method Jun. 29, 1976

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