Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6126291 | Umbrella having detachable illuminative grip | Jung-Jen Chang | 2000-10-03 |
| 5992433 | Multiple-fold automatic umbrella with simplified control mechanism and minimized elements | Jung-Jen Chang | 1999-11-30 |