12 Utility Patents
#73 in Qingdao
#10,401 in China
#326,927 in the World
Forward Citations = 3
Company Filing History:
China University of Petroleum
China University of Geosciences (beijing)
The Research Institute of Petroleum Exploration and Development (riped) of the Petro China Company Limited (petro China)
4. 1 out of 1
Science and Technology Research Institute Ltd., Petro China
5. 1 out of 3
Oil and Gas Technology Research Institute, Petrochina Changqing Oilfield Company
where one patent can have more than one assignee
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