Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D618297 | Golf club shaft | Katsumi Miyama, Tsutomu Ibuki | 2010-06-22 |
| D606147 | Golf club shaft | Katsumi Miyama, Tsutomu Ibuki | 2009-12-15 |
| D602108 | Golf club shaft | Katsumi Miyama, Tsutomu Ibuki | 2009-10-13 |