Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5083455 | Air meter for an internal combustion engine and method of producing the same | Yasuo Saito, Toshifumi Usui, Shinya Igarashi, Youichi Furuhashi | 1992-01-28 |
| 4790178 | Intake structure of internal combustion engine with bypass intake passage for mounting air flow meter | Toshifumi Usui, Kinsaku Yamada, Tadao Osawa | 1988-12-13 |
| 4782805 | Control device for throttle valve for internal combustion engine | Shozo Yanagisawa, Tadao Osawa, Toshifumi Usui, Yutaka Takaku | 1988-11-08 |