US Patent 7988438 Extrusion die vacuum seals
Patent 7988438 was granted and assigned to Advanced Drainage Systems, Inc. on August, 2011 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
February 11, 2008
0
Date of Patent
August 2, 2011
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Patent Application Number
12028990
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Patent Inventor Names
William V. Shaffer
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Gerald S. Sutton
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Randall A. Kolbet
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Patent Jurisdiction
Patent Number
Patent Primary Examiner
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