Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4787494 | Hydraulic operating unit of friction engaging apparatus for transmissions | Koji Sumiya | 1988-11-29 |
| 4727967 | Parking mechanism of a transmission | Koji Sumiya | 1988-03-01 |
| 4633739 | System for controlling automatic transmission having communication control valve means | Yoshichika Arakawa, Koji Sumiya, Yoshikazu Sakaguchi | 1987-01-06 |
| 4618038 | Control apparatus of an automatic transmission with a lock-up clutch | Yoshichika Arakawa, Koji Sumiya, Yoshikazu Sakaguchi | 1986-10-21 |
| 4616531 | Hydraulic and electronic control system for an automatic transmission | Yoshichika Arakawa, Koji Sumiya, Yoshikazu Sakaguchi | 1986-10-14 |