27 Utility Patents
#16 in Qingdao
#3,937 in China
#108,374 in the World
Forward Citations = 9
Company Filing History:
China University of Petroleum
China University of Geosciences (beijing)
Northwest Oilfield Branch, China Petroleum & Chemical Co., Ltd
4. 3 out of 3
Oil and Gas Technology Research Institute, Petrochina Changqing Oilfield Company
5. 1 out of 232
Sichuan University
where one patent can have more than one assignee
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