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