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Signal coding
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Patent number 5,008,748
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Issue date Apr 16, 1991
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British Telecommunications Public Limited Company
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Michael D. Carr
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Signal coding
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Patent number 5,008,747
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Issue date Apr 16, 1991
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British Telecommunications Public Limited Company
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Michael D. Carr
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G06 - COMPUTING CALCULATING COUNTING
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Video level control
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Patent number 4,860,103
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Issue date Aug 22, 1989
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British Telecommunications p.l.c.
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Mohammad S. Azam
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Video data transmission
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Patent number 4,597,010
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Issue date Jun 24, 1986
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British Telecommunications
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Michael D. Carr
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H04 - ELECTRIC COMMUNICATION TECHNIQUE