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Raster operations
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Patent number 5,254,979
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Issue date Oct 19, 1993
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DuPont Pixel Systems Limited
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Neil F. Trevett
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G06 - COMPUTING CALCULATING COUNTING
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Crossbar converter
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Patent number 5,047,760
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Issue date Sep 10, 1991
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DuPont Pixel Systems Limited
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Neil F. Trevett
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Integral transform method
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Patent number 5,042,000
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Issue date Aug 20, 1991
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Du Pont Pixel Systems Limited
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David R. Baldwin
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G06 - COMPUTING CALCULATING COUNTING
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Analog controlled mixer
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Patent number 5,008,754
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Issue date Apr 16, 1991
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Du Pont Pixel Systems, Limited
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Neil F. Trevett
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H04 - ELECTRIC COMMUNICATION TECHNIQUE