Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11649880 | Gearbox and driving device using the same | Qiumei Li, Baofeng Ji, Yongjun Zhao | 2023-05-16 |
| 8075439 | Automatic opening-closing device | Zhiqiang Wu, Jicheng Pan | 2011-12-13 |