Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5174319 | Longer effective automatic umbrella | Jonathan Cheng | 1992-12-29 |
| 5144969 | Fully automatic collapsible umbrella | Jonathan Cheng | 1992-09-08 |
| 5088512 | Lightly operable fully automatic umbrella | Jonathan Cheng | 1992-02-18 |