Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6740011 | Device for exercising foot muscle | Cheng-Li Tsai | 2004-05-25 |
| 6676580 | Exercise device | Cheng-Li Tsai | 2004-01-13 |
| 5743448 | Raincoat concealing backpack | — | 1998-04-28 |
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6740011 | Device for exercising foot muscle | Cheng-Li Tsai | 2004-05-25 |
| 6676580 | Exercise device | Cheng-Li Tsai | 2004-01-13 |
| 5743448 | Raincoat concealing backpack | — | 1998-04-28 |