Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869063 | Exhaust gas control means for engine | Tadashi Sakurai | 1989-09-26 |
| 4840029 | Exhaust gas control means for engine | Tadashi Sakurai | 1989-06-20 |
| 4795420 | Exhaust gas control means for engine | Tadashi Sakurai, Hideaki Kitta | 1989-01-03 |