Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10661351 | Quick-stop cutting device for a lathe | Chunzheng DUAN, Yumin Liu, Wei Sun, Yuwen SUN, Kang Ju | 2020-05-26 |
| 9932784 | Device for handling oil pipes and method for workover | Zenglin Wang, Guangqi Gao, Lei Zhang, Zeng Fu, Huihui Song +6 more | 2018-04-03 |