US Patent 7921921 Downhole backup system and method
Patent 7921921 was granted and assigned to Baker Hughes on April, 2011 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
September 24, 2008
0
Date of Patent
April 12, 2011
0
Patent Application Number
12236803
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Patent Inventor Names
David S. Bishop
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Marc N. Samuelson
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Patent Jurisdiction
Patent Number
Patent Primary Examiner
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