31 Utility Patents
#1,456 in Beijing
#3,277 in China
#87,320 in the World
Forward Citations = 51
Company Filing History:
China University of Petroleum
Hfi Innovation Inc.
China Agricultural University
4. 5 out of 32,281

5. 2 out of 832,492 patents
Other
where one patent can have more than one assignee
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