Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5674133 | Structure of golf club head | Poh-Heng Chang | 1997-10-07 |
| 5669826 | Structure of golf club head | Poh-Heng Chang | 1997-09-23 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5674133 | Structure of golf club head | Poh-Heng Chang | 1997-10-07 |
| 5669826 | Structure of golf club head | Poh-Heng Chang | 1997-09-23 |