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1176609
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Patent number 1,176,609
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Issue date Mar 21, 1916
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1120588
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Patent number 1,120,588
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Issue date Dec 8, 1914
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL