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Class Information
Number: 340/425.1
Name: Communications: electrical > Repeater in unspecified type communications line or channel (e.g., relay station)
Description: Subject matter comprising a generically recited transmission path (e.g., telecommunications or communications line) having signal retransmitting or amplifying equipment in the path.










Sub-classes under this class:

Class Number Class Name Patents
340/425.2 Power control 30


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8633822 Method and apparatus for a radio frequency identification repeater which is coupled to a radio frequency identification tag Jan. 21, 2014
8509289 Relay device and wireless relay method Aug. 13, 2013
8466773 Method of authorization Jun. 18, 2013
8432258 Apparatus and method facilitating communication between components of a radio frequency identification system Apr. 30, 2013
8416062 Method and apparatus for improving RFID tag reading Apr. 9, 2013
8266348 System and method of communicating with portable devices Sep. 11, 2012
8232868 Method and system for networking radio tags in a radio frequency identification system Jul. 31, 2012
8059590 Bandwidth allocation and soft handoff in multi-hop cellular communication networks Nov. 15, 2011
8059576 Signal repeater system Nov. 15, 2011
7999661 Signal relay device, communication network system and operation system Aug. 16, 2011
7945358 System and method for testing the integrity of a vehicle testing/diagnostic system May. 17, 2011
7890229 Method and device for waking users of a bus system, and corresponding users Feb. 15, 2011
7800319 Lighting control system having a security system input Sep. 21, 2010
7746786 Retransmission control method and device Jun. 29, 2010
7741970 Method and apparatus for a radio frequency identification repeater Jun. 22, 2010
7684520 Method and apparatus for bus repeater tapering Mar. 23, 2010
7656285 Method and apparatus for communicating the existence of an emergency situation without uniquely identifying the source of the communication Feb. 2, 2010
7653411 Electronic apparatus having infrared communication function Jan. 26, 2010
7612686 Emergency underwater notification device Nov. 3, 2009
7564342 Audio signal system for vehicle remote locking mechanism Jul. 21, 2009
7460006 Conformal repeater unit Dec. 2, 2008
7408446 Burglar alarm device for vehicle Aug. 5, 2008
7403097 Conformal repeater unit Jul. 22, 2008
7224272 Power line repeater system and method May. 29, 2007
7199701 Repeater unit Apr. 3, 2007
7148811 Emergency underwater notification device Dec. 12, 2006
7098777 Electronic equipment communications system and repeater Aug. 29, 2006
7061371 Auto monitor Jun. 13, 2006
6972661 Anti-interference relay device for signal transmission Dec. 6, 2005
6904373 USB-controllable power supply Jun. 7, 2005
6628992 Remote terminal unit Sep. 30, 2003
6400281 Communications system and method for interconnected networks having a linear topology, especially railways Jun. 4, 2002
6037868 Alarm method and apparatus for a mobile communication repeating system Mar. 14, 2000
5930399 Data encoding for a communication channel supporting a subset of the characters to be transmitted Jul. 27, 1999
5838226 Communication protocol for transmission system for controlling and determining the status of electrical devices from remote locations Nov. 17, 1998
5835005 Power-line data transmission method and system utilizing relay stations Nov. 10, 1998
5781125 Arrangement for the wireless exchange of data between a servicing device and a control unit in a motor vehicle Jul. 14, 1998
5592507 Intermediate relay station of a digital microwave communication system using service channel for monitoring and controlling space and/or time diversity, heterodyne relay, phase control, freque Jan. 7, 1997
5572352 Apparatus for repowering and monitoring serial links Nov. 5, 1996
5475363 Disaster prevention monitoring apparatus Dec. 12, 1995
5349584 Method of maintaining control in a trunked communication system Sep. 20, 1994
5223816 Security and communication system with location detection Jun. 29, 1993
5162936 Apparatus for monitoring the operation of an optical repeater Nov. 10, 1992
5140308 Radio automatic alarm transfer system Aug. 18, 1992
4758822 Bidirectional amplifier Jul. 19, 1988
4695919 Circuit arrangement for protection against surge voltages for a repeater Sep. 22, 1987
4651134 Switched capacitor coupled line receiver circuit Mar. 17, 1987
4638298 Communication system having message repeating terminals Jan. 20, 1987
4528615 Repeater housing and circuit mounting structure Jul. 9, 1985
4362952 Apparatus and method for initiation of reciprocal remote feeding of intermediate stations of a communication installation Dec. 7, 1982

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