Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11085245 | Multi-path combined high-low voltage plasma rock-breaking drill bit, drill bit apparatus and drilling method | Yonghong Liu, Qiang Sun, Renjie Ji, Baoping Cai, Xiaopeng Li +5 more | 2021-08-10 |