Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9617808 | Continuous oil pipe clamp mechanism | Qingfeng Yu, Jilei Fang | 2017-04-11 |
| 9493997 | Floating clamping device for injection head of continuous oil pipe | Qingfeng Yu, Jilei Fang | 2016-11-15 |
| 8882467 | Centrifugal impeller | Lo Ching Kwok, Wei Yu | 2014-11-11 |