5 Utility Patents
#7,720 in Beijing
#26,660 in China
#823,425 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 76

where one patent can have more than one assignee
Get your Inventor Badge Today