Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8266983 | Damper spring device, flywheel, clutch disk, and clutch disk for lockup mechanism | Kazuo Iwata, Nobuharu Kato | 2012-09-18 |
| 6024346 | Coil spring resistant to permanent set and fatigue | Takeshi Yabushita, Noritoshi Takamura, Michihiko Ayada | 2000-02-15 |