Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6663516 | Game racquet with separate head and handle portions for reducing vibration | William D. Severa, Po-Jen Cheng, Michael Ryan Moon | 2003-12-16 |
| 6500080 | Game racquet with separate head and handle portions for reducing vibration | William D. Severa, Po-Jen Cheng, Michael Ryan Moon | 2002-12-31 |