Issued Patents 2022
Showing 1–2 of 2 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 |
| 11255556 | Disinfecting device for central air conditioner | Xiuquan Ma, Qing Liu, Tianyu Xu | 2022-02-22 |