Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6845609 | Apparatus and a method for exhaust gas purification in an internal combustion engine | — | 2005-01-25 |
| 6637195 | Apparatus and method for engine exhaust purification | Atsushi Sakai | 2003-10-28 |
| 6568176 | Engine exhaust purification device | Takeshi Nakamura | 2003-05-27 |
| 6494037 | Engine exhaust purification device | Ritsuo Sato | 2002-12-17 |