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Digital echo suppressor
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Patent number 5,022,074
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Issue date Jun 4, 1991
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Rockwell International Corporation
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David C. Nicholas
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Packet switching module
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Patent number 4,912,701
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Issue date Mar 27, 1990
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Rockwell International Corporation
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David C. Nicholas
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Analog echo suppressor
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Patent number 4,748,665
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Issue date May 31, 1988
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Rockwell International Corporation
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David C. Nicholas
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Dual TDM switching apparatus
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Patent number 4,228,535
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Issue date Oct 14, 1980
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Rockwell International Corporation
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Harold W. Workman
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Integral frame slip circuit
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Patent number 4,158,107
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Issue date Jun 12, 1979
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Rockwell International Corporation
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David C. Nicholas
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Network synchronization apparatus
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Patent number 4,144,414
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Issue date Mar 13, 1979
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Rockwell International Corporation
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David C. Nicholas
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Conferencing apparatus
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Patent number 3,958,084
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Issue date May 18, 1976
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Rockwell International Corporation
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David C. Nicholas
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Selective switching apparatus
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Patent number 3,947,639
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Issue date Mar 30, 1976
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Rockwell International Corporation
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David C. Nicholas
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H04 - ELECTRIC COMMUNICATION TECHNIQUE