Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4949539 | Muffler with a purifying system for car or motorcycle | Chi-chu Hsu, Chin-ching Yu, Suyueh Chao | 1990-08-21 |
| 4871042 | Electric bicycle | Chi-chu Hsu, Chin-ching Yu, Suyueh Chao | 1989-10-03 |