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3706516
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Patent number 3,706,516
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Issue date Dec 19, 1972
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3702274
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Patent number 3,702,274
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Issue date Nov 7, 1972
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3684598
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Patent number 3,684,598
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Issue date Aug 15, 1972
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3676265
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Patent number 3,676,265
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Issue date Jul 11, 1972
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3551945
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Patent number 3,551,945
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Issue date Jan 5, 1971
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3417168
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Patent number 3,417,168
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Issue date Dec 17, 1968
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3208103
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Patent number 3,208,103
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Issue date Sep 28, 1965
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2998501
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Patent number 2,998,501
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Issue date Aug 29, 1961
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL