Issued Patents 2019
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10202807 | Vertical shaft drilling rig using novel drilling method | Jianbin Li, Hua Zhao, Ningchuan Zhang, Wei Xiao, Xingjian Zhuo +4 more | 2019-02-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10202807 | Vertical shaft drilling rig using novel drilling method | Jianbin Li, Hua Zhao, Ningchuan Zhang, Wei Xiao, Xingjian Zhuo +4 more | 2019-02-12 |