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2115061
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Patent number 2,115,061
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Issue date Apr 26, 1938
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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2106997
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Patent number 2,106,997
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Issue date Feb 1, 1938
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL