Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7841171 | Exhaust emission control device for internal combustion engine | Shigeto Yahata, Tsukasa Kuboshima, Kazuharu Tochikawa | 2010-11-30 |
| 7794528 | Exhaust gas cleaning device for internal combustion engine | Kazuharu Tochikawa, Makoto Saito | 2010-09-14 |
| 7707827 | Exhaust gas purifying apparatus for internal combustion engine | Kazuharu Tochikawa, Shigeto Yahata | 2010-05-04 |
| 7624571 | Exhaust gas purifying apparatus for internal combustion engine and method for estimating collected amount of exhaust particles | Kazuharu Tochikawa, Shigeto Yahata | 2009-12-01 |