Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5156405 | Golf ball | Mikio Yamada, Akihiko Hamada | 1992-10-20 |
| 4974852 | One-piece solid golf ball | Hidenori Hiraoka, Kiyoto Maruoka, Mikio Yamada | 1990-12-04 |
| 4871589 | Method of coating a golf ball | Akihiko Hamada | 1989-10-03 |
| 4802674 | Golf ball | — | 1989-02-07 |