33 Utility and 1 Design Patents
#1,358 in Beijing
#3,040 in China
#79,140 in the World
rank by utility patentsForward Citations = 104
Company Filing History:

China Petroleum & Chemical Corporation
Sinopec Research Institute of Petroleum Engineering
4. 3 out of 159

5. 2 out of 1,178

where one patent can have more than one assignee
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