Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9901015 | Display device | Yung-Yeh Chang | 2018-02-20 |
| 6923728 | Golf club face impact alignment device | — | 2005-08-02 |
| 6739981 | Golf club angular orientation indicating device | — | 2004-05-25 |
| 6699138 | Golf swing indication device | — | 2004-03-02 |
| 6458038 | Golf putting indication device | — | 2002-10-01 |
| 6398663 | Golf position and parallel indicating device for the top of backswing | — | 2002-06-04 |