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John D. Edwards
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Campbell, CA, US
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last 30 patents
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Patent Grant
Time division multiplexed computerized branch exchange
Patent number
4,627,050
Issue date
Dec 2, 1986
Rolm Corporation
Howard W. Johnson
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Patent Grant
Distributed CBX system employing packet network
Patent number
4,313,036
Issue date
Jan 26, 1982
Rolm Corporation
Michael D. Jabara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Patent Grant
Method and apparatus for generating digital dual frequency signals
Patent number
3,985,966
Issue date
Oct 12, 1976
Rolm Corporation
John D. Edwards
H04 - ELECTRIC COMMUNICATION TECHNIQUE