Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7588042 | Folding shaft for umbrellas | — | 2009-09-15 |
| 7575009 | Mechanism for opening and collapsing umbrella | — | 2009-08-18 |
| 6329766 | Digital illumination adjusting circuit | Daniel Liu | 2001-12-11 |