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Tamperproof closure
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Patent number 4,333,577
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Issue date Jun 8, 1982
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Owens-Illinois, Inc.
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George V. Mumford
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3929246
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Patent number 3,929,246
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Issue date Dec 30, 1975
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3587898
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Patent number 3,587,898
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Issue date Jun 28, 1971
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL