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Distributed clocking system
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Patent number 5,870,441
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Issue date Feb 9, 1999
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IPC Information Systems, Inc.
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John M. Cotton
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G06 - COMPUTING CALCULATING COUNTING
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Distributed clocking system
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Patent number 5,577,075
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Issue date Nov 19, 1996
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IPC Information Systems, Inc.
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John M. Cotton
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G06 - COMPUTING CALCULATING COUNTING
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Shared buffer switching module
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Patent number 5,535,197
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Issue date Jul 9, 1996
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IPC Information Systems, Inc.
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John M. Cotton
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Expandable digital switching network
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Patent number 4,201,891
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Issue date May 6, 1980
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International Telephone & Telegraph Corporation
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Alan J. Lawrence
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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