Issued Patents 2023
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11702321 | Traction machine assembly and elevator | Ruguang Liu, Guochen Gao | 2023-07-18 |
| 11667495 | Brake disc releasing device, turning device, elevator rescue kit and method | Hongliang Wu, James L. Hubbard | 2023-06-06 |