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3880374
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Patent number 3,880,374
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Issue date Apr 29, 1975
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3075719
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Patent number 3,075,719
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Issue date Jan 29, 1963
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL