Issued Patents 2025
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12427540 | Coating die head and coating equipment | Jingjing Pu | 2025-09-30 |
| 12241876 | Borehole wall spin-shearing device and testing method for in-situ borehole shear test | Wenkai Feng, Xiaoyu Yi, Yihe Li, Qian Li, Ke Wan | 2025-03-04 |
| 12234699 | Inner tube assembly of drill tool and rope coring drill tool thereof | Guanghong Deng, Beihua Chen | 2025-02-25 |
| 12221859 | Ball-clamp type fall arrester for drill pipe | Youlin Li, Guanghong Deng | 2025-02-11 |