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2948433
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Patent number 2,948,433
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Issue date Aug 9, 1960
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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2467698
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Patent number 2,467,698
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Issue date Apr 19, 1949
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL