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Rubber kneading method
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Patent number 4,840,491
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Issue date Jun 20, 1989
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Bridgestone Corporation
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Yoshiaki Hagiwara
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3761217
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Patent number 3,761,217
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Issue date Sep 25, 1973
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3296982
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Patent number 3,296,982
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Issue date Jan 10, 1967
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2938236
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Patent number 2,938,236
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Issue date May 31, 1960
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2740991
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Patent number 2,740,991
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Issue date Apr 10, 1956
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B44 - DECORATIVE ARTS
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2563266
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Patent number 2,563,266
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Issue date Aug 7, 1951
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2534291
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Patent number 2,534,291
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Issue date Dec 19, 1950
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2326927
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Patent number 2,326,927
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Issue date Aug 17, 1943
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2319040
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Patent number 2,319,040
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Issue date May 11, 1943
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2134897
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Patent number 2,134,897
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Issue date Nov 1, 1938
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1930736
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Patent number 1,930,736
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Issue date Oct 17, 1933
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1855830
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Patent number 1,855,830
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Issue date Apr 26, 1932
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1541396
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Patent number 1,541,396
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Issue date Jun 9, 1925
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1492591
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Patent number 1,492,591
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Issue date May 6, 1924
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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