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Building drum assembly
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Patent number 4,229,246
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Issue date Oct 21, 1980
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The Steelastic Company
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Robert S. Vanderzee
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Raw edge V-belt building apparatus
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Patent number 4,105,488
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Issue date Aug 8, 1978
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Akron Standard, division of Eagle-Picher Industries, Inc.
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Richard H. Hayes
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL