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Vacuum packaging apparatus
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Patent number 5,638,664
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Issue date Jun 17, 1997
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Hantover, Inc.
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Clark A. Levsen
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Vacuum packaging machine
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Patent number 5,239,808
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Issue date Aug 31, 1993
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Hantover, Inc.
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Andrew J. Wells
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL