|
US3475558A
(en)
*
|
1964-09-01 |
1969-10-28 |
Magnavox Co |
Time gated pseudonoise multiplexing system
|
|
US3428899A
(en)
*
|
1964-12-28 |
1969-02-18 |
Nippon Electric Co |
Selective communication system wherein fach information pulse is address coded for transmission on a selected idle carrier frequency
|
|
DE1591305B1
(de)
*
|
1966-02-23 |
1971-03-11 |
Nippon Electric Co |
Satelliten uebertragungssystem mit beliebugem zugriff fuer mehrere bodenstationen
|
|
US4066964A
(en)
*
|
1967-01-06 |
1978-01-03 |
Rockwell International Corporation |
Communication system
|
|
US3523250A
(en)
*
|
1967-02-21 |
1970-08-04 |
Martin Marietta Corp |
Time division multiplex multiple frequency diversity troposcatter communication system
|
|
US3492581A
(en)
*
|
1967-05-24 |
1970-01-27 |
Peninsula Research & Dev Corp |
Emergency calling system
|
|
US3542956A
(en)
*
|
1967-05-31 |
1970-11-24 |
Communications Satellite Corp |
Pcm telephone communication system
|
|
JPS499241B1
(hu)
*
|
1967-08-07 |
1974-03-02 |
|
|
|
DE1928986B2
(de)
*
|
1968-06-29 |
1978-09-21 |
N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) |
Übertragungssystem mit einer Sende- und einer Empfangsvorrichtung zur Übertragung von Informationen in einem vorgeschriebenen Frequenzband und dafür geeignete Sende- und Empfangsvorrichtungen
|
|
US3691464A
(en)
*
|
1968-11-25 |
1972-09-12 |
Technical Communications Corp |
Asynchronous, swept frequency communication system
|
|
US3675513A
(en)
*
|
1970-07-24 |
1972-07-11 |
Bell Telephone Labor Inc |
Communications system for alphanumeric information employing audio tone signalling
|
|
JPS5512777B1
(hu)
*
|
1971-07-16 |
1980-04-04 |
|
|
|
US4856024A
(en)
*
|
1979-07-02 |
1989-08-08 |
Honeywell Inc. |
Data transceiving modem
|
|
GB2165724B
(en)
*
|
1984-10-13 |
1988-05-11 |
Stc Plc |
Remote meter reading
|
|
US4821292A
(en)
*
|
1987-06-03 |
1989-04-11 |
General Electric Company |
Adaptive limiter/detector which changes time constant upon detection of dotting pattern
|
|
US4905302A
(en)
*
|
1987-06-03 |
1990-02-27 |
General Electric Company |
Trunked radio repeater system
|
|
US4903262A
(en)
*
|
1987-08-14 |
1990-02-20 |
General Electric Company |
Hardware interface and protocol for a mobile radio transceiver
|
|
US4835731A
(en)
*
|
1987-08-14 |
1989-05-30 |
General Electric Company |
Processor-to-processor communications protocol for a public service trunking system
|
|
US4926496A
(en)
*
|
1987-08-14 |
1990-05-15 |
General Electric Company |
Method and apparatus for infrequent radio users to simply obtain emergency assistance
|
|
US5125102A
(en)
*
|
1987-06-03 |
1992-06-23 |
Ericsson Ge Mobile Communications Inc. |
Trunked radio repeater system including synchronization of a control channel and working channels
|
|
US4905234A
(en)
*
|
1987-06-03 |
1990-02-27 |
General Electric Company |
Apparatus and method for transmitting digital data over a radio communications channel
|
|
US5274838A
(en)
*
|
1987-06-03 |
1993-12-28 |
Ericsson Ge Mobile Communications Inc. |
Fail-soft architecture for public trunking system
|
|
US5175866A
(en)
*
|
1987-06-03 |
1992-12-29 |
Ericcson Ge Mobile Communications Inc. |
Fail-soft architecture for public trunking system
|
|
US5274837A
(en)
*
|
1987-06-03 |
1993-12-28 |
Ericsson Ge Mobile Communications Inc. |
Trunked radio repeater system with multigroup calling feature
|
|
US4939746A
(en)
*
|
1987-06-03 |
1990-07-03 |
General Electric Company |
Trunked radio repeater system
|
|
US5086506A
(en)
*
|
1987-08-14 |
1992-02-04 |
General Electric Company |
Radio trunking fault detection system with power output monitoring and on-air monitoring
|
|
US5128930A
(en)
*
|
1987-08-14 |
1992-07-07 |
General Electric Company |
Processor-to-processor communications protocol for a public service trunking system
|
|
US5265093A
(en)
*
|
1987-08-14 |
1993-11-23 |
Ericsson Ge Mobile Communications Inc. |
Hardware interface and protocol for a mobile radio transceiver
|
|
US5109543A
(en)
*
|
1987-08-14 |
1992-04-28 |
General Electric Company |
Hardware interface and protocol for a mobile radio transceiver
|
|
US5206863A
(en)
*
|
1987-08-14 |
1993-04-27 |
General Electric Company |
Processor-to-processor communications protocol for a public service trunking system
|
|
US5117501A
(en)
*
|
1988-08-08 |
1992-05-26 |
General Electric Company |
Dynamic regrouping in a trunked radio communications system
|
|
US5077828A
(en)
*
|
1988-09-01 |
1991-12-31 |
General Electric Company |
RF channel expansion in a trunked radio communications system
|
|
US5408680A
(en)
*
|
1992-08-11 |
1995-04-18 |
Ericsson Ge Mobile Communications Inc. |
Single channel autonomous digitally trunked RF communications system
|