Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6811502 | Racquet with elongated peripheral main string segments and enlarged sweet spot | Richard Janes, Po-Jen Cheng, Gerald J. LeVault | 2004-11-02 |
| 6685583 | Handle for a sports racquet | Po-Jen Cheng | 2004-02-03 |