Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11193327 | Spring winder and curtains using the spring winder | Nian Zhang, Zhao-Xuan Sun | 2021-12-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11193327 | Spring winder and curtains using the spring winder | Nian Zhang, Zhao-Xuan Sun | 2021-12-07 |