US Patent 7428913 Valve assembly having articulating rigid seating surface
Patent 7428913 was granted and assigned to MKS Instruments on September, 2008 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
April 26, 2005
Date of Patent
September 30, 2008
Patent Application Number
11114388
Patent Inventor Names
Richard A. Benson
0
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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