US Patent 7980841 Defined ratio dual-wall pipe die
Patent 7980841 was granted and assigned to Advanced Drainage Systems, Inc. on July, 2011 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
February 25, 2008
0
Date of Patent
July 19, 2011
0
Patent Application Number
12036429
0
Patent Inventor Names
Randall A. Kolbet
0
Gerald S. Sutton
0
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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