Issued Patents 2024
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12168912 | Downhole hydraulic directional control valve used by hydraulic power pumps and working method thereof | Bing Guan, Baozhong Ma, Sifeng Bi, Meng Liu, Xuejiang Li +1 more | 2024-12-17 |