3 Utility and 2 Design Patents
#11,233 in Beijing
#43,298 in China
rank by utility patentsForward Citations = 8
Company Filing History:
Drilling Research Institute of China National Petroleum Company
Beijing Siling Robot Technology Co., Ltd.
Cnpc Engineering Technology R&d Company Limited
4. 1 out of 75

5. 1 out of 1
Beijing Petroleum Machinery Co.
where one patent can have more than one assignee
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