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Operatorless extrusion system
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Patent number 6,652,785
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Issue date Nov 25, 2003
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Harrel, Incorporated
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Holton E. Harris
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Nuclear gauge traverse
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Patent number 4,734,922
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Issue date Mar 29, 1988
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Harrel, Inc.
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Holton E. Harris
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Three-mode process control
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Patent number 4,430,698
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Issue date Feb 7, 1984
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Harrel, Incorporated
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Holton E. Harris
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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