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3188013
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Patent number 3,188,013
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Issue date Jun 8, 1965
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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2539267
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Patent number 2,539,267
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Issue date Jan 23, 1951
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL