Issued Patents All Time
Showing 51–53 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5441065 | Multiple-fold automatic umbrella for safe operation | Jung-Jen Chang | 1995-08-15 |
| 5390686 | Multiple-fold automatic umbrella | Jung-Jen Chang | 1995-02-21 |
| 5361792 | Reliably operated automatic umbrella with upwardly and downwardly thrusted push button | Jung-Jen Chang | 1994-11-08 |