Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D326886 | Golf club head | Donald J. C. Sun | 1992-06-09 |
| 5050879 | Golf driver with variable weighting for changing center of gravity | Donald J. C. Sun | 1991-09-24 |
| 5013041 | Golf driver with variable weighting for changing center of gravity | Donald J. C. Sun | 1991-05-07 |