US Patent 8161864 Firearm gas piston operating system
Patent 8161864 was granted and assigned to STURM, RUGER & COMPANY, INC. on April, 2012 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
March 24, 2009
Date of Patent
April 24, 2012
Patent Application Number
12409839
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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