Issued Patents 2022
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11525320 | Casing-protective horizontal directional drilling coaxial coring device for geological investigation | Xuefeng Yan, Peng Zhang | 2022-12-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11525320 | Casing-protective horizontal directional drilling coaxial coring device for geological investigation | Xuefeng Yan, Peng Zhang | 2022-12-13 |