2 Utility Patents
#616 in Qingdao
#57,978 in China
Forward Citations = 0
Company Filing History:
China University of Petroleum (east China)
China University of Geosciences (beijing)
Cnooc Energy Development Co., Ltd. Engineering Branch
4. 1 out of 1
Tianjin Branch of China National Offshore Oil Corporation Ltd.
where one patent can have more than one assignee
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