Issued Patents 2025
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12221888 | Ventilation method for high gas working face based on alternating intake and air return in mine gallery | Guorui Feng, Zhu Li, Jingyu Zhang, Chengen Qi, Guilin WU | 2025-02-11 |