Issued Patents 2020
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10718176 | Drilling speed improvement device capable of producing both hydraulic pulse and impact vibration | Hualin Liao, Jilei NIU, Zhichuan Guan, Yandong Yang, Yucai Shi +1 more | 2020-07-21 |