Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870941 | Exhaust gas recirculation system for internal combustion engine | — | 1989-10-03 |
MH
Masahiro Hisatomi
Overall (1989): #81,173 of 140,708Top 60%
1
Patents 1989