Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6035844 | Cutting tool and method for making the same | Ryuji Otani, Isao Fuwa, Masahiro Ikegami, Toshikazu Hamada, Kyoichiro Nakayama | 2000-03-14 |
| 5855157 | Saw blade | Hidezumi Okamura, Ryuji Ohtani, Isao Fuwa, Masahiro Ikegami, Masao Torigoe +1 more | 1999-01-05 |