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3547751
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Patent number 3,547,751
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Issue date Dec 15, 1970
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3338990
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Patent number 3,338,990
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Issue date Aug 29, 1967
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3128262
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Patent number 3,128,262
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Issue date Apr 7, 1964
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2975472
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Patent number 2,975,472
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Issue date Mar 21, 1961
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2516552
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Patent number 2,516,552
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Issue date Jul 25, 1950
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1786483
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Patent number 1,786,483
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Issue date Dec 30, 1930
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1776366
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Patent number 1,776,366
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Issue date Sep 23, 1930
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1536700
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Patent number 1,536,700
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Issue date May 5, 1925
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL