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3607297
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Patent number 3,607,297
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Issue date Sep 21, 1971
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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2935929
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Patent number 2,935,929
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Issue date May 10, 1960
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...