Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11313192 | Method for lowering oil pipe in gas well without well-killing, soluble bridge plug and material preparation method thereof | Xianwen Li, Qiaorong Han, Yanming Zhang, Xu Ma, Zhanguo Ma +25 more | 2022-04-26 |
| 11016546 | Heat dissipation apparatus and terminal device having same | Wei Li, Chunyang Chen, Zhiguo Zhang, Quanming Li | 2021-05-25 |
| 8356624 | Self-operated pressure transmission type of pressure reducing valve with corrugated pipe | — | 2013-01-22 |