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2743631
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Patent number 2,743,631
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Issue date May 1, 1956
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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2677981
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Patent number 2,677,981
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Issue date May 11, 1954
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL