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3855908
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Issue date Dec 24, 1974
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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2563632
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Patent number 2,563,632
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Issue date Aug 7, 1951
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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2423965
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Patent number 2,423,965
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Issue date Jul 15, 1947
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2097899
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Patent number 2,097,899
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Issue date Nov 2, 1937
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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1658543
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Patent number 1,658,543
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Issue date Feb 7, 1928
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD