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Method for producing sheet material
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Patent number 4,184,904
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Issue date Jan 22, 1980
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Mintz; Charlotte
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William Gaffney
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3881851
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Patent number 3,881,851
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Issue date May 6, 1975
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3456286
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Patent number 3,456,286
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Issue date Jul 22, 1969
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3184793
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Patent number 3,184,793
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Issue date May 25, 1965
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1990434
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Patent number 1,990,434
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Issue date Feb 5, 1935
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL