Issued Patents 2025
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12286850 | Full-hole reverse circulation cluster-type down-the-hole (DTH) hammer with multiple independent channels | Yechen Zhao, Chengliang Yan, Yeshui Zhao, Yechun Zhao, Da Zhang | 2025-04-29 |