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3559235
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Patent number 3,559,235
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Issue date Feb 2, 1971
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3217072
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Patent number 3,217,072
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Issue date Nov 9, 1965
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3160690
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Patent number 3,160,690
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Issue date Dec 8, 1964
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3145243
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Patent number 3,145,243
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Issue date Aug 18, 1964
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3115673
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Patent number 3,115,673
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Issue date Dec 31, 1963
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3075239
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Patent number 3,075,239
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Issue date Jan 29, 1963
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3021559
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Patent number 3,021,559
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Issue date Feb 20, 1962
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL