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2321885
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Patent number 2,321,885
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Issue date Jun 15, 1943
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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1507054
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Patent number 1,507,054
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Issue date Sep 2, 1924
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL