Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5513847 | Magnetically restored golf practice device with visual and audio display | Chih-Chang Hu | 1996-05-07 |
| 5390930 | Magnetically restored golf practice device | Chih-Chang Hu | 1995-02-21 |