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Video luminance self keyer
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Patent number 4,947,255
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Issue date Aug 7, 1990
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The Grass Valley Group, Inc.
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Richard A. Jackson
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Digital video effects apparatus
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Patent number 4,873,568
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Issue date Oct 10, 1989
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The Grass Valley Group, Inc.
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Richard A. Jackson
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Digital clip and gain circuit
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Patent number 4,771,192
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Issue date Sep 13, 1988
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The Grass Valley Group, Inc.
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Richard A. Jackson
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Picture transformation memory
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Patent number 4,743,970
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Issue date May 10, 1988
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The Grass Valley Group, Inc.
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Ronnie D. Barnett
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G06 - COMPUTING CALCULATING COUNTING
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Television special effects system
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Patent number 4,689,681
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Issue date Aug 25, 1987
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The Grass Valley Group, Inc.
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Richard A. Jackson
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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