Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4488457 | Malfunction prevention device of automotive hydraulic transmission | Keiichi Ishikawa, Hiroyuki Shimada | 1984-12-18 |
| 4478108 | Control apparatus for oil pressure operated type transmission for vehicle | Masakazu Maezono | 1984-10-23 |
| 4320821 | Control device for a torque converter in an automatic speed change gear for vehicles | — | 1982-03-23 |
| 4290325 | Apparatus for control of oil pressure operated type transmission for vehicle | — | 1981-09-22 |
| 4290513 | Operation oil supply apparatus in oil pressure operated type transmission for vehicle | Yoji Yamada | 1981-09-22 |
| 4271951 | Check valve apparatus for oil pressure operated clutch | Yoji Yamada, Takeyuki Shimizu, Masaru Yamashita | 1981-06-09 |
| 4253553 | Control apparatus for an oil pressure operated transmission in automotive vehicle | Yoji Yamada, Takeyuki Shimizu, Masakazu Maezono | 1981-03-03 |
| 4252031 | Automatic transmission | Yoji Yamada | 1981-02-24 |