Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10202807 | Vertical shaft drilling rig using novel drilling method | Jianbin Li, Kleuters Nikolaus, Hua Zhao, Wei Xiao, Xingjian Zhuo +4 more | 2019-02-12 |
| 9995086 | Center-pillared full-face shaft drilling machine | Hua Zhao, Jianbin Li, Kleuters Nikolaus, Wei Xiao, Xingjian Zhuo +4 more | 2018-06-12 |