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Class Information
Number: 370/276
Name: Multiplex communications > Duplex
Description: Subject matter for effectively transmitting messages simultaneously, one in each direction, over the same transmission medium.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4363121 |
Method and system for simultaneous bidirectional transmission of information |
Dec. 7, 1982 |
| 4353126 |
Method for coded data transmission in half-duplex operation between data terminal equipment of two data stations |
Oct. 5, 1982 |
| 4326287 |
Two wire bi-directional digital telephone link |
Apr. 20, 1982 |
| 4279033 |
Bidirectional transmission circuit for interlocked signals |
Jul. 14, 1981 |
| 4272843 |
System for transmitting service communications |
Jun. 9, 1981 |
| 4247934 |
Testing system for data transmission paths |
Jan. 27, 1981 |
| 4239940 |
Carrier current communications system |
Dec. 16, 1980 |
| 4238779 |
Data transmission and reception system |
Dec. 9, 1980 |
| 4232188 |
Circuit arrangement for receiving simplex and duplex current telegraph characters |
Nov. 4, 1980 |
| 4230903 |
Data transmission system |
Oct. 28, 1980 |
| 4220816 |
Digital duplex transmission system |
Sep. 2, 1980 |
| 4217572 |
Arrangements for transmitting electrical signals between two devices which are connected by contacts |
Aug. 12, 1980 |
| 4173714 |
Communication circuit with combined power feed and data transmission over a phantom channel |
Nov. 6, 1979 |
| 4172963 |
Checker and automatic synchronizer for coding equipment |
Oct. 30, 1979 |
| 4131767 |
Echo cancellation in two-wire, two-way data transmission systems |
Dec. 26, 1978 |
| 4127816 |
Carrier detect and automatic loopback circuit |
Nov. 28, 1978 |
| 4075427 |
System for phase division multiplex duplex communication over a two-wire circuit between a master terminal and a slave terminal |
Feb. 21, 1978 |
| 4046959 |
Data communication system using photocouplers |
Sep. 6, 1977 |
| 4001829 |
High average power millimeter duplexer |
Jan. 4, 1977 |
| 3999013 |
Bi-directional signaling apparatus |
Dec. 21, 1976 |
| 3979719 |
Multiple block binary synchronous duplex communications system and its method of operation |
Sep. 7, 1976 |
| 3975712 |
Asynchronous communication interface adaptor |
Aug. 17, 1976 |
| 3937882 |
Full-duplex communication system on a two wire line |
Feb. 10, 1976 |
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