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3918353
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Patent number 3,918,353
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Issue date Nov 11, 1975
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3847281
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Patent number 3,847,281
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Issue date Nov 12, 1974
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL