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Dynamic channel assignment
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Issue date Nov 25, 2008
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AT&T Corp.
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Li Fung Chang
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Dynamic channel assignment
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Patent number 6,954,465
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Issue date Oct 11, 2005
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AT&T Corp.
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Li Fung Chang
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Secure telecommunications
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Issue date Feb 21, 1995
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AT&T Corp.
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Andrew F. Bulfer
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Secure teleconferencing
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Issue date Oct 4, 1994
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AT&T Bell Laboratories
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Paul D. Bartoli
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Video scrambling system
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Patent number 5,206,906
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Issue date Apr 27, 1993
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AT&T Bell Laboratories
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Bruce E. McNair
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Cryptographic transmission system
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Issue date Feb 10, 1987
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AT&T Information Systems Inc.
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Bruce E. McNair
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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