Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11603751 | Push-pull force control method for horizontal directional drilling machine and horizontal directional drilling machine | Li Zhang, Zhonghai Zhang, Jiguang Zhang, Yonghua Zhang, Peng Wang +3 more | 2023-03-14 |
| 11268328 | Double-walled drill pipe and drilling machine | Ming YANG, Lihua HAN, Ming Li, Tao Ma, Feng Cao +1 more | 2022-03-08 |