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Digital filter
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Patent number 6,405,230
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Issue date Jun 11, 2002
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Sony United Kingdom Limited
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David Charles William Richards
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H03 - BASIC ELECTRONIC CIRCUITRY
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Video to film conversion
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Patent number 5,430,489
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Issue date Jul 4, 1995
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Sony United Kingdom, Ltd.
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John W. Richards
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Video to film conversion
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Patent number 5,313,281
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Issue date May 17, 1994
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Sony United Kingdom Ltd.
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John W. Richards
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Video standards conversion
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Patent number 5,303,044
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Issue date Apr 12, 1994
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Sony United Kingdom Ltd.
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John W. Richards
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Video signal processing
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Patent number 4,953,107
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Issue date Aug 28, 1990
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Sony Corporation
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David J. Hedley
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G06 - COMPUTING CALCULATING COUNTING
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