1 Utility Patents
#1,293 in Shandong
#107,471 in China
Forward Citations = 0
Company Filing History:
Sinopec Oilfield Service Corporation
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd.
China Petroleum Chemical Corporation
4. 1 out of 5
Sinopec Shengli Petroleum Engineering Co., Ltd
where one patent can have more than one assignee
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