Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5361792 | Reliably operated automatic umbrella with upwardly and downwardly thrusted push button | Jung-Jen Chang | 1994-11-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5361792 | Reliably operated automatic umbrella with upwardly and downwardly thrusted push button | Jung-Jen Chang | 1994-11-08 |