Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665322 | Method of cleaning exhaust gas | Yoshida Kiyohide, Sumiya Satoshi, Muramatsu Gyo | 1997-09-09 |
| 5075274 | Exhaust gas cleaner | Yoshida Kiyohide, Sumiya Satoshi, Muramatsu Gyo | 1991-12-24 |