XY

Xiaofeng YANG

CL Cnpc Chuanqing Drilling Engineering Company Limited: 1 patents #27 of 61Top 45%
Overall (All Time): #2,632,562 of 4,157,543Top 65%
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Patent #TitleCo-InventorsDate
11225837 Dual-speed dual—core enhanced drilling equipment Liexiang Han, Zuo Chen, Bin LIU, Sheng-Kang Yu, Jianlin Yao +10 more 2022-01-18