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1971-11-02 |
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1968-09-25 |
1971-11-23 |
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1971-09-07 |
Bell Telephone Labor Inc |
Party line stations for selective calling systems
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1974-04-08 |
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Honeywell Inf Systems |
Error-rate monitoring unit in a communication system
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1976-01-20 |
Honeywell Information Systems, Inc. |
Apparatus for continuous assessment of data transmission accuracy in a communication system
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1976-06-18 |
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American Telephone And Telegraph Company, At&T Bell Laboratories |
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Communications error detection system
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1989-06-01 |
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1989-07-04 |
1992-12-01 |
Fujitsu Limited |
Method for automatically discriminating low-speed interface units installed in an optical data transmission apparatus together with automatically confirming the installation
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