Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8684849 | Fixed type constant velocity universal joint | Keisuke Sone, Hirokazu Ooba, Kazuhiko Yoshida | 2014-04-01 |
| 8545337 | Fixed uniform-motion universal joint | Keisuke Sone, Hirokazu Ooba, Kazuhiko Yoshida | 2013-10-01 |