Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4972815 | Intake air quantity regulating device for an automobile engine | Kazuyoshi Yamamoto, Mamoru Sumida, Osamu Matsumoto | 1990-11-27 |
| 4880207 | Intake throttle valve return device of engine | Osamu Matsumoto, Mamoru Sumida | 1989-11-14 |
| 4870944 | Auxiliary air control valve for engine | Osamu Matsumoto | 1989-10-03 |