6 Utility Patents
#1 in Puyang
#22,502 in China
#697,517 in the World
Forward Citations = 0
Company Filing History:
China Petroleum Chemical Corporation
Sinopec Zhongyuan Oilfield Service Corporation Drilling Engineering Research Institute
Sinopec Petroleum Engineering Technology Service Co., Ltd.
4. 1 out of 1
Drilling Engineering Technology Research Inst. of Sinopec Zhongyuan Petroleum Engineering Co., Ltd
5. 1 out of 1
Sinopec Zhongyuan Oilfild Service Corporation Drilling Engineering Research Institute
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