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2297356
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Patent number 2,297,356
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Issue date Sep 29, 1942
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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2090241
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Patent number 2,090,241
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Issue date Aug 17, 1937
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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2038811
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Patent number 2,038,811
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Issue date Apr 28, 1936
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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1994796
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Patent number 1,994,796
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Issue date Mar 19, 1935
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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1974609
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Patent number 1,974,609
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Issue date Sep 25, 1934
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL