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3853663
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Patent number 3,853,663
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Issue date Dec 10, 1974
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3765983
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Patent number 3,765,983
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Issue date Oct 16, 1973
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3727619
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Patent number 3,727,619
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Issue date Apr 17, 1973
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3642010
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Patent number 3,642,010
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Issue date Feb 15, 1972
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3620875
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Patent number 3,620,875
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Issue date Nov 16, 1971
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3600249
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Patent number 3,600,249
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Issue date Aug 17, 1971
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3188258
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Patent number 3,188,258
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Issue date Jun 8, 1965
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3121655
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Patent number 3,121,655
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Issue date Feb 18, 1964
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2576546
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Patent number 2,576,546
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Issue date Nov 27, 1951
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2252854
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Patent number 2,252,854
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Issue date Aug 19, 1941
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL