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3520530
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Patent number 3,520,530
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Issue date Jul 14, 1970
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3468530
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Patent number 3,468,530
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Issue date Sep 23, 1969
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3386729
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Patent number 3,386,729
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Issue date Jun 4, 1968
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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1856972
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Patent number 1,856,972
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Issue date May 3, 1932
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS