Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11391095 | Polycrystalline diamond compact and drilling bit | Hongping Tian, Qiang Liu, Xiaobo Liu | 2022-07-19 |
| 11326402 | Hybrid bit with roller cones having inserts | Qiang Liu, Xiaobo Liu, Shigui Jiang | 2022-05-10 |