Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9732570 | Apparatus for tripping oil pipe and system for automatic well workover | Guangqi Gao, Lei Zhang, Huihui Song, Zeng Fu, Hui Zhang +6 more | 2017-08-15 |
| 8746093 | Oil pumping unit | Jianli XU, Zhengquan CHENG, Bin Wei, Zhonghui Zhang, Bingsheng Liu +3 more | 2014-06-10 |