Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11015388 | Ladder cord fastening seat for non-pull window blind | Hung-Hao Chen | 2021-05-25 |
| 10982488 | Dual-torsion-spring cord rolling device for window blind without exposed pull cord | Hung-Hao Chen | 2021-04-20 |