10 Utility and 1 Design Patents
#74 in Shandong
#12,980 in China
#407,520 in the World
rank by utility patentsForward Citations = 144
Company Filing History:
China University of Petroleum
Wanhua Chemical Group Co., Ltd.
Yantai Longyuan Power Technology Co., Ltd.
4. 1 out of 92
Crrc Qingdao Sifang Co., Ltd.
5. 1 out of 139

where one patent can have more than one assignee
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