US Patent 8468753 Drilling rigs and erection methods
Patent 8468753 was granted and assigned to National Oilwell Varco on June, 2013 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
February 29, 2008
Date of Patent
June 25, 2013
Patent Application Number
12074270
Patent Inventor Names
Chunqiao Ren
0
Hui Chun Sheng
0
Robert Benjamin Donnally
0
Stuart Arthur Lyall McCurdy
0
Xi Lin Liu
0
Yan Yu
0
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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