Issued Patents 2019
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10233695 | Weight-on-bit self-adjusting drill bit | Zhichuan Guan, Yongwang Liu, Huaigang Hu, Ben Guan, Yucai Shi | 2019-03-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10233695 | Weight-on-bit self-adjusting drill bit | Zhichuan Guan, Yongwang Liu, Huaigang Hu, Ben Guan, Yucai Shi | 2019-03-19 |