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Partitioned paperboard food tray
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Patent number 5,356,070
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Issue date Oct 18, 1994
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Westvaco Corporation
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William R. Rigby
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3762023
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Patent number 3,762,023
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Issue date Oct 2, 1973
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3757651
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Patent number 3,757,651
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Issue date Sep 11, 1973
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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3653111
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Patent number 3,653,111
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Issue date Apr 4, 1972
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3463059
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Patent number 3,463,059
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Issue date Aug 26, 1969
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3373919
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Patent number 3,373,919
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Issue date Mar 19, 1968
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3266390
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Patent number 3,266,390
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Issue date Aug 16, 1966
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3126797
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Patent number 3,126,797
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Issue date Mar 31, 1964
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1692986
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Patent number 1,692,986
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Issue date Nov 27, 1928
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD