Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6644021 | Exhaust gas purifying apparatus of internal combustion engine | Kojiro Okada | 2003-11-11 |
| 6558636 | Plasma type exhaust gas cleaning apparatus | Kojiro Okada, Kazuo Koga, Osamu Nakayama, Keisuke Kawamura, Kiyoshi Kawamura | 2003-05-06 |
| 6558637 | Exhaust emission purifier | Kazuo Koga, Kojiro Okada, Osamu Nakayama, Keisuke Kawamura, Kiyoshi Kawamura +1 more | 2003-05-06 |
| 6532733 | Plasma exhaust gas treatment device | Osamu Nakayama, Kazuo Koga | 2003-03-18 |