Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7273574 | Golf ball manufacturing method | Jun Yamakawa | 2007-09-25 |
| 7204290 | Apparatus for removing cover of golf ball from core | Jun Yamakawa, Osamu Nishikawa, Masao Takami | 2007-04-17 |
| 6833098 | Method of removing cover of golf ball from core | Jun Yamakawa, Osamu Nishikawa, Masao Takami | 2004-12-21 |