13 Utility Patents
#3,372 in Beijing
#9,048 in China
#291,860 in the World
Forward Citations = 9
Company Filing History:
China University of Petroleum-beijing
Cnpc Engineering Technology R&d Company Limited
Cnpc Chuanqing Drilling Engineering Company Limited
4. 1 out of 37
China University of Geosciences (beijing)
where one patent can have more than one assignee
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