6 Utility Patents
#300 in Chengdu
#22,241 in China
#694,535 in the World
Forward Citations = 1
Company Filing History:
Cnpc Engineering Technology R&d Company Limited

Southwest Petroleum University
4. 2 out of 2
China Academy of Building Research
5. 1 out of 159

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