Issued Patents 2019
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10233694 | Dynamic inwardly eccentrically-placed directional drill bit type rotation guidance apparatus | Wei Li, Hongxiang Lei, Qingyou Liu, Xu Si, Tieshan ZHANG +8 more | 2019-03-19 |