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Kneading extruder
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Patent number 8,721,312
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Issue date May 13, 2014
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Kohei Sawa
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2964785
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Patent number 2,964,785
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Issue date Dec 20, 1960
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2412658
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Patent number 2,412,658
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Issue date Dec 17, 1946
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2314062
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Patent number 2,314,062
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Issue date Mar 16, 1943
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2302610
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Patent number 2,302,610
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Issue date Nov 17, 1942
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1834573
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Patent number 1,834,573
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Issue date Dec 1, 1931
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1743302
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Patent number 1,743,302
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Issue date Jan 14, 1930
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1390599
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Patent number 1,390,599
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Issue date Sep 13, 1921
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1330054
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Patent number 1,330,054
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Issue date Feb 10, 1920
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL