Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4549398 | Exhaust gas cleaning device for diesel engines | Kiyohiko Oishi, Kiyoshi Kobashi | 1985-10-29 |
| 4538412 | Exhaust gas cleaning device for diesel engines | Kiyohiko Oishi, Yasuhiko Ishida | 1985-09-03 |