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Tube density separator and method
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Patent number 6,212,736
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Issue date Apr 10, 2001
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Vandergriff, Inc.
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Arvel L. Vandergriff
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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Cotton gin feeder and preginner
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Patent number 5,016,320
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Issue date May 21, 1991
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Consolidated HGM Corp.
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Arvel L. Vandergriff
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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Feeder for cotton gin
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Patent number 4,914,786
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Issue date Apr 10, 1990
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Consolidated HGM Corporation
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Arvel L. Vandergriff
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING