SD

Shiming Dong

CL Cnpc Chuanqing Drilling Engineering Company Limited: 1 patents #27 of 61Top 45%
📍 Chaole, CN: #3 of 9 inventorsTop 35%
Overall (All Time): #2,632,561 of 4,157,543Top 65%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
11225837 Dual-speed dual—core enhanced drilling equipment Liexiang Han, Zuo Chen, Bin LIU, Xiaofeng YANG, Sheng-Kang Yu +10 more 2022-01-18