US Patent 8904716 Bi-directionally raisable drilling rig mast
Patent 8904716 was granted and assigned to National Oilwell Varco on December, 2014 by the United States Patent and Trademark Office.
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Patent Inventor Names
Chunqiao Ren0
Robert Benjamin Donnally0
Xilin Liu0
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US Patent 08904716 Bi-directionally raisable drilling rig mast US Patent 8904716 Bi-directionally raisable drilling rig mast
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Patent Number
089047160
Patent Number
89047160
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Official Website
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Is a
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
089047160
Date of Patent
December 9, 2014
0Patent Application Number
138686960
Date Filed
April 23, 2013
0Official Website
Patent Primary Examiner
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US Patent 08904716 Bi-directionally raisable drilling rig mast
Infobox
Is a
Patent applicant
Current assignee
Patent jurisdiction
Patent number
08904716
Date of patent
December 9, 2014
Patent application number
13868696
Date Filed
April 23, 2013
Patent primary examiner
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