Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4958546 | Saw blade | Yoshikazu Takegawa, Susumu Tsujimoto, Katsuhiko Kawabata | 1990-09-25 |
| 4827822 | Saw blade | Yoshikazu Takegawa, Susumu Tsujimoto, Katsuhiko Kawabata | 1989-05-09 |
| 4813324 | Saw blade | Yoshikazu Takegawa, Susumu Tsujimoto, Katsuhiko Kawabata | 1989-03-21 |
| 4727788 | Saw blade | Yoshikazu Takegawa, Susumu Tsujimoto, Katsuhiko Kawabata | 1988-03-01 |