6 Utility Patents
#6,712 in Beijing
#22,249 in China
#694,733 in the World
Forward Citations = 0
Company Filing History:
China University of Petroleum
Cnpc Engineering Technology R&d Company Limited
Cnpc Chuanqing Drilling Engineering Company Limited
4. 1 out of 38
China University of Geosciences (beijing)
where one patent can have more than one assignee
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