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N:1 transcoder
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Patent number 6,320,876
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Issue date Nov 20, 2001
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Alcatel USA, Inc.
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Harbhajan S. Virdee
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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E1 compression control method
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Patent number 5,818,843
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Issue date Oct 6, 1998
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DSC Communications Corporation
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Harbhajan S. Virdee
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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N: 1 Transcoder
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Patent number 5,768,278
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Issue date Jun 16, 1998
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DSC Communications Corporation
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Harbhajan S. Virdee
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Full duplex speakerphone
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Patent number 5,657,384
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Issue date Aug 12, 1997
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Tandy Corporation
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Daniel W. Staudacher
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Echo cancellation apparatus
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Patent number 5,473,686
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Issue date Dec 5, 1995
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Tandy Corporation
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Harbhajan S. Virdee
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H04 - ELECTRIC COMMUNICATION TECHNIQUE