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Switching fabric
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Patent number 6,157,643
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Issue date Dec 5, 2000
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Nokia Telecommunications Oy
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Jian Ma
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Three stage switching unit
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Patent number 5,504,824
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Issue date Apr 2, 1996
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Telefonaktiebolaget L M Ericsson
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Magnus K. S. Buhrgard
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Signal switching system
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Patent number 5,377,181
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Issue date Dec 27, 1994
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Linear Switch Corp.
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William P. Rogers
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Redundant microwave configuration
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Patent number 4,070,637
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Issue date Jan 24, 1978
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Communications Satellite Corporation
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Francois Tsvi Assal
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Redundancy switching system
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Patent number 4,061,989
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Issue date Dec 6, 1977
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TRW Inc.
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Peter G. Petrelis
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H04 - ELECTRIC COMMUNICATION TECHNIQUE