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TDM Communication system
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Patent number 4,498,167
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Issue date Feb 5, 1985
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International Telephone & Telegraph Corporation
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James H. Bowen
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3889235
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Patent number 3,889,235
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Issue date Jun 10, 1975
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3862369
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Patent number 3,862,369
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Issue date Jan 21, 1975
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3761621
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Patent number 3,761,621
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Issue date Sep 25, 1973
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3723657
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Patent number 3,723,657
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Issue date Mar 27, 1973
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3720791
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Patent number 3,720,791
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Issue date Mar 13, 1973
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3627946
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Patent number 3,627,946
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Issue date Dec 14, 1971
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3535450
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Patent number 3,535,450
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Issue date Oct 20, 1970
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3467876
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Patent number 3,467,876
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Issue date Sep 16, 1969
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3422226
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Patent number 3,422,226
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Issue date Jan 14, 1969
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3266024
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Patent number 3,266,024
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Issue date Aug 9, 1966
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G06 - COMPUTING CALCULATING COUNTING
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2640965
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Patent number 2,640,965
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Issue date Jun 2, 1953
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H04 - ELECTRIC COMMUNICATION TECHNIQUE