Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6964624 | Bumper guard for a sports racquet | David W. Repetto, Po-Jen Cheng | 2005-11-15 |
| D458324 | Racket having bearings in frame | Po-Jen Cheng | 2002-06-04 |
| 5348294 | String protecting jacket of game racket | — | 1994-09-20 |
| 5310516 | Method of making a composite racket | — | 1994-05-10 |
| 5071125 | Racket | — | 1991-12-10 |