Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11180980 | Downhole oil, gas, water and sand separation method and separator | Yan Wang, Demin Wang, Quan Liu, Jintang Liu | 2021-11-23 |
| 8757257 | Crown-shaped separation device for separating oil and water in well | Yan Wang, Demin Wang, Rongjie Zhu, Long Ren, Hongyan Wang | 2014-06-24 |