Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6089990 | Set of iron clubs | — | 2000-07-18 |
| 5816936 | Golf club head and method of manufacturing the same | Yuichi Aizawa, Yasuto Imai | 1998-10-06 |
| 5547194 | Golf club head | Yuichi Aizawa, Yasuto Imai | 1996-08-20 |
| 5472201 | Golf club head and striking face | Yuichi Aizawa | 1995-12-05 |