Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5494022 | Ball projecting apparatus | — | 1996-02-27 |
| 5386988 | Tennis practice device | Chin M. Huang, Lan K. Sung | 1995-02-07 |
| 5338028 | Racket stringing apparatus | — | 1994-08-16 |
| 4699378 | Tennis ball throwing machine | — | 1987-10-13 |