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1622128
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Patent number 1,622,128
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Issue date Mar 22, 1927
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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1445879
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Patent number 1,445,879
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Issue date Feb 20, 1923
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL