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3753846
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Patent number 3,753,846
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Issue date Aug 21, 1973
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3462909
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Patent number 3,462,909
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Issue date Aug 26, 1969
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3354015
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Patent number 3,354,015
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Issue date Nov 21, 1967
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3350247
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Patent number 3,350,247
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Issue date Oct 31, 1967
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3054708
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Patent number 3,054,708
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Issue date Sep 18, 1962
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2876927
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Patent number 2,876,927
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Issue date Mar 10, 1959
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2746637
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Patent number 2,746,637
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Issue date May 22, 1956
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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818144
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Patent number 818,144
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Issue date Apr 17, 1906
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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396225
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Patent number 396,225
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Issue date Jan 15, 1889
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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211054
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Patent number 211,054
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Issue date Dec 17, 1878
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL