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3891084
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Patent number 3,891,084
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Issue date Jun 24, 1975
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3454439
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Patent number 3,454,439
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Issue date Jul 8, 1969
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL