Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9617900 | Deterioration diagnosis device for an exhaust gas purification apparatus | Koji Hagiwara, Yasushi Iwazaki | 2017-04-11 |
| 9611776 | Deterioration diagnosis device for an exhaust gas purification apparatus | Koji Hagiwara, Toru Kidokoro, Yasushi Iwazaki, Takahiko Fujiwara | 2017-04-04 |