Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8267144 | Roman shade window curtain having a special head rail for using a roller shade as its release/retraction control | Chih-Yung Wang | 2012-09-18 |
| 8127821 | Roman shade window curtain having rolling spool for multi-step retracting/unfolding control | Chih-Yung Wang | 2012-03-06 |