Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4724745 | Hydraulic servo drum for friction clutch | Koji Sumiya, Yutaka Taga, Kazuaki Watanabe | 1988-02-16 |
| 4682534 | Hydraulic servo for friction coupling element of automatic transmission | Koji Sumiya, Seitoku Kubo, Kazuaki Watanabe | 1987-07-28 |