Issued Patents 2022
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11261687 | Wellhead sealing device of sucker-rod pumping machine | Kao Si | 2022-03-01 |
| 11250824 | Musical system and method thereof | Bin Yan, Xiaolu Liu, Zhengjun Yan, Zhonglin Zhou, Min Zhou | 2022-02-15 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11261687 | Wellhead sealing device of sucker-rod pumping machine | Kao Si | 2022-03-01 |
| 11250824 | Musical system and method thereof | Bin Yan, Xiaolu Liu, Zhengjun Yan, Zhonglin Zhou, Min Zhou | 2022-02-15 |