Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8959677 | Sofa air bed | Lee Pil Yul, Huang Chang Jiu | 2015-02-24 |
| 8256042 | Collapsible bed frame including cross units and method for constructing collapsible bed frame | Lee Pil Yul, Huang Changjiu | 2012-09-04 |
| 7757314 | Collapsible structure | Lee Pil Yul, Huang Chang Jiu | 2010-07-20 |