Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5795243 | Club head with a shock absorbing hosel | Poh-Heng Chang | 1998-08-18 |
| 5795245 | Neck weighting structure for golf clubs | Poh-Heng Chang | 1998-08-18 |
| 5722900 | Structure of golf club head | — | 1998-03-03 |
| 5674133 | Structure of golf club head | Poh-Heng Chang | 1997-10-07 |
| 5669826 | Structure of golf club head | Poh-Heng Chang | 1997-09-23 |