Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9255577 | Large-scale submersible sewage pump | Songmao Zhai, Quanmin Li, Jianguo Ying, Zhilong Lin, Jun Jing | 2016-02-09 |
| 9103452 | Large-scale hydraulic variable-speed floating box flap valve | Songmao Zhai, Quanmin Li, Jianguo Ying, Rungen Liu, Dongliang Xiong | 2015-08-11 |