Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11280237 | Honeycomb filter | Fumihiko Yoshioka, Yoshiaki Hatakeyama | 2022-03-22 |
| 11280236 | Honeycomb filter | Fumihiko Yoshioka, Yoshiaki Hatakeyama | 2022-03-22 |
| 10704440 | Exhaust purification system of internal combustion engine | Shinichiro Otsuka, Kenji Katayama, Ryoko Yamada | 2020-07-07 |
| 10677124 | Exhaust purification filter | Shinichiro Otsuka, Ryoko Yamada | 2020-06-09 |
| 10669906 | Honeycomb filter | Fumihiko Yoshioka, Yoshiaki Hatakeyama | 2020-06-02 |
| 10557390 | Honeycomb filter | Fumihiko Yoshioka, Norihiro Wakida, Yoshiaki Hatakeyama | 2020-02-11 |
| 10344643 | Exhaust purification system of internal combustion engine | Shinichiro Otsuka, Kenji Katayama, Ryoko Yamada | 2019-07-09 |