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3671285
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Patent number 3,671,285
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Issue date Jun 20, 1972
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3574031
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Patent number 3,574,031
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Issue date Apr 6, 1971
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3563870
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Patent number 3,563,870
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Issue date Feb 16, 1971
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3530084
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Patent number 3,530,084
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Issue date Sep 22, 1970
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3274089
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Patent number 3,274,089
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Issue date Sep 20, 1966
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3188228
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Patent number 3,188,228
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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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3057791
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Patent number 3,057,791
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Issue date Oct 9, 1962
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2961389
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Patent number 2,961,389
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Issue date Nov 22, 1960
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2897127
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Patent number 2,897,127
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Issue date Jul 28, 1959
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL