Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6740011 | Device for exercising foot muscle | Cheng-Chung Tsai | 2004-05-25 |
| 6676580 | Exercise device | Cheng-Chung Tsai | 2004-01-13 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6740011 | Device for exercising foot muscle | Cheng-Chung Tsai | 2004-05-25 |
| 6676580 | Exercise device | Cheng-Chung Tsai | 2004-01-13 |