Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12232622 | Folding step stool | Xuelin ZHU, Weiqiang Liu | 2025-02-25 |
| D1051257 | Exercise step | Weiqiang Liu, Tao Jiang | 2024-11-12 |
| D1024585 | Step stool | Weiqiang Liu, Xuelin ZHU | 2024-04-30 |
| 11891857 | Assembled ladder | Chen Zhu | 2024-02-06 |
| 11821262 | Lifting positioning structure for ladder tool platform | Chen Zhu | 2023-11-21 |
| 11319751 | Telescopic positioning structure used for ladder | Chen Zhu | 2022-05-03 |
| 11083302 | Folding locking mechanism used for step stool | Heng-Yu Yan | 2021-08-10 |