Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10920633 | Maintenance tool and maintenance method for exhaust purification device | Yoshihisa Ueda, Katsushi OSADA | 2021-02-16 |
| 9441521 | Method for removing foreign matter from a selective reduction catalyst system | Yasuo Okamoto, Koji Sakumoto | 2016-09-13 |
| 9181839 | Exhaust pipe | Takao Onodera, Isao Ohara | 2015-11-10 |
| 8747761 | Exhaust gas purification device | Isao Ohara | 2014-06-10 |