6 Utility Patents
#294 in Chengdu
#21,990 in China
#692,645 in the World
Forward Citations = 0
Company Filing History:
Southwest Petroleum University
China University of Geosciences (wuhan)
University of Electronic Science and Technology of China
4. 1 out of 391
China University of Petroleum
5. 1 out of 1
Oil & Gas Survey Center, China Geological Survey
where one patent can have more than one assignee
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