Issued Patents 2024
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1041176 | Comb | — | 2024-09-10 |
| 11976554 | Bottom-hole impact-rotation stepping combined unloading rock-breaking efficient drilling system and method thereof | Yongwang Liu, Zhichuan Guan, Deyong Zou | 2024-05-07 |