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2227283
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Patent number 2,227,283
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Issue date Dec 31, 1940
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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1545262
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Patent number 1,545,262
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Issue date Jul 7, 1925
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL