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3832213
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Patent number 3,832,213
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Issue date Aug 27, 1974
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3816220
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Patent number 3,816,220
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Issue date Jun 11, 1974
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3728986
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Patent number 3,728,986
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Issue date Apr 24, 1973
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3688735
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Patent number 3,688,735
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Issue date Sep 5, 1972
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3557525
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Patent number 3,557,525
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Issue date Jan 26, 1971
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL