US Patent 7121552 Piston ring
Patent 7121552 was granted and assigned to ZF Sachs on October, 2006 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
December 4, 2003
0
Date of Patent
October 17, 2006
0
Patent Application Number
10727741
0
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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