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1973-12-25 |
Bell Telephone Labor Inc |
Multiplex communication system
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1973-06-11 |
1975-02-21 |
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1973-07-25 |
1975-01-07 |
Bell Telephone Labor Inc |
Redundant data transmission arrangement
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1974-10-16 |
1976-09-07 |
Northern Electric Company Limited |
Tow wire, full duplex data transmission system
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1975-07-23 |
1977-08-16 |
Johnson Controls, Inc. |
Multiple message frame adaptor apparatus for loop communication system
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1975-12-29 |
1977-01-11 |
Bell Telephone Laboratories, Incorporated |
Fault isolation in a serial-looped transmission system
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1976-02-11 |
1977-07-12 |
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1977-08-02 |
1980-10-15 |
Standard Telephones Cables Ltd |
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1977-10-21 |
1980-01-29 |
Minnesota Mining And Manufacturing Company |
Multi-terminal computer system with dual communication channels
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1978-09-22 |
1981-01-13 |
Data Line Corporation |
Automatic shunt device
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1978-10-02 |
1980-02-26 |
Burroughs Corporation |
Self-healing loop communications system
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JPS55117357A
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1979-03-02 |
1980-09-09 |
Nippon Telegr & Teleph Corp <Ntt> |
Time-division multiplex communication system
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1979-07-02 |
1985-01-15 |
Rolm Corporation |
Interconnecting apparatus for a distributed switching telephone system
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JPS5847111B2
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1979-09-10 |
1983-10-20 |
株式会社日立製作所 |
ル−プ伝送システム
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JPS5689150A
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1979-12-20 |
1981-07-20 |
Hitachi Ltd |
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1979-12-27 |
1987-01-09 |
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1980-10-31 |
1983-08-30 |
Foster Wheeler Energy Corporation |
Automatic line termination in distributed industrial process control system
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JPS56169450A
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1980-05-30 |
1981-12-26 |
Agency Of Ind Science & Technol |
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1980-07-11 |
1984-11-22 |
株式会社日立製作所 |
ル−プ伝送システム
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JPS5943862B2
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1980-09-12 |
1984-10-25 |
株式会社日立製作所 |
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JPS608667B2
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1980-10-09 |
1985-03-05 |
株式会社明電舎 |
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1981-03-25 |
1982-09-29 |
Hitachi Ltd |
Transmission line switching system
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1981-07-10 |
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Ericsson Telefon Ab L M |
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1981-10-05 |
1984-07-17 |
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1982-02-08 |
1986-05-29 |
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Communication system
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1982-08-25 |
1991-01-03 |
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Datenuebertragungsgeraet fuer ringuebertragungssystem.
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1982-08-28 |
1984-03-01 |
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1982-08-30 |
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Fujitsu Ltd |
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1983-10-19 |
1986-11-11 |
Japanese National Railways |
Channel control system for loop type signal transmission channel
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1983-12-05 |
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1983-12-30 |
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1984-01-19 |
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Burroughs Corporation |
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1984-03-24 |
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1986-02-10 |
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1987-07-10 |
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Method for fault detection and fast protection switching in transmission systems
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Rochester Institute Of Technology |
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