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2510304
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Patent number 2,510,304
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Issue date Jun 6, 1950
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2454116
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Patent number 2,454,116
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Issue date Nov 16, 1948
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2448492
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Patent number 2,448,492
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Issue date Aug 31, 1948
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2448274
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Patent number 2,448,274
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Issue date Aug 31, 1948
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2431102
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Patent number 2,431,102
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Issue date Nov 18, 1947
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2429692
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Patent number 2,429,692
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Issue date Oct 28, 1947
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2167539
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Patent number 2,167,539
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Issue date Jul 25, 1939
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL