Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11885387 | Friction material and preparation method therefor, and friction part | Ruguang Liu | 2024-01-30 |
| 11702321 | Traction machine assembly and elevator | Ruguang Liu, Fengkun Zhu | 2023-07-18 |
| 10975927 | Brake device for elevator and an elevator system | Zixu Zhang, Ruguang Liu | 2021-04-13 |
| 10288135 | Brake for elevator and a replacement method of damper of the brake for elevator | Yatao Li, YaFei Ren | 2019-05-14 |