Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5228578 | Adjustable book shelf | — | 1993-07-20 |
| D336739 | Double-blade windshield wiper | Chang Shu-Yun | 1993-06-22 |
| D334161 | Double blade windshield wiper | Chang Shu-Yun | 1993-03-23 |