7 Utility Patents
#169 in Qingdao
#19,102 in China
#597,499 in the World
Forward Citations = 2
Company Filing History:
China University of Petroleum
China University of Geosciences (beijing)
Science and Technology Research Institute Ltd., Petro China
4. 1 out of 2
Research Institute of Petroleum Exploration & Development
where one patent can have more than one assignee
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