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Class Information
Number: 370/279
Name: Multiplex communications > Duplex > Communication over free space > Duplex repeaters
Description: Subject matter including circuitry for compensating attenuation losses of duplex signals or for increasing the communication range for extension terminal equipment at either end of a duplex transmission line.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
5910943 Method and device in radio based telecommunication system using repeaters Jun. 8, 1999
5883882 Fault detection in a frequency duplexed system Mar. 16, 1999
5883884 Wireless digital communication system having hierarchical wireless repeaters with autonomous hand-off Mar. 16, 1999
5848054 Repeater for transmission system for controlling and determining the status of electrical devices from remote locations Dec. 8, 1998
5812933 Duplex RF repeater for personal communications system Sep. 22, 1998
5754540 Expandable integrated circuit multiport repeater controller with multiple media independent interfaces and mixed media connections May. 19, 1998
5734643 Method and apparatus for transmitting data over a radio communications network Mar. 31, 1998
5678177 RF repeaters for time division duplex cordless telephone system Oct. 14, 1997
5651001 Method and apparatus for full duplex signaling Jul. 22, 1997
5634191 Self-adjusting RF repeater arrangements for wireless telephone systems May. 27, 1997
5634196 Radio call history list May. 27, 1997
5570354 Device for increasing the functional area of a system of digitally operating cordless telephones Oct. 29, 1996
5509028 Radio transmission method using repeater stations with spectrum reversal Apr. 16, 1996
5377255 RF repeaters for time division duplex cordless telephone systems Dec. 27, 1994
5327580 Full duplex RF repeater/base station providing microprocessor-controlled simultaneous CTCSS tone encode/decode Jul. 5, 1994
5319635 Electronic duplex communication system Jun. 7, 1994
5231629 Full-duplex communication system Jul. 27, 1993
5091906 Quasi-duplex radio system using bi-directional hole extension Feb. 25, 1992
5010583 Repeater for a wide area coverage system Apr. 23, 1991
4908820 Non-reciprocal bidirectional duplexer Mar. 13, 1990
4849963 Cellular radio telephone enhancement circuit Jul. 18, 1989
4754450 TDM communication system for efficient spectrum utilization Jun. 28, 1988
4672601 Duplex interconnect/dispatch trunked radio system Jun. 9, 1987
4510595 Modified time-division transmission technique for digital mobile radio systems Apr. 9, 1985
4490818 Repeater station for use in a radio relay system to protect time deviations of time slots Dec. 25, 1984

1 2 3 4

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