Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11199092 | Hard rock roadway and tunnel boring machine with actively rotating hobs | Hongxiang Jiang, Songyong Liu, Zhencai Zhu | 2021-12-14 |
| 10233755 | Drilling and bursting heading machine | Songyong Liu, Zhencai Zhu, Hongxiang Jiang, Wei Li, Gang Shen +2 more | 2019-03-19 |