Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7922004 | Diesel filter | Suminobu Otsubo, Yasuji Nishi, Satoshi Nagata | 2011-04-12 |
| 7906022 | Diesel filter | Suminobu Otsubo, Yasuji Nishi, Satoshi Nagata | 2011-03-15 |
| 5306424 | Fuel filter | — | 1994-04-26 |
| 5181497 | Evapo-control valve | Kazumasa Komura | 1993-01-26 |