Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |
HM
Hirokazu Maehara
Overall (1989): #25,833 of 140,708Top 20%
2
Patents 1989