Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5634952 | Exhaust gas filter and apparatus for treating exhaust gases using the same | Yoshiyuki Kasai, Ikuko Ishiyama | 1997-06-03 |
| 5595581 | Exhaust gas filter and apparatus for treating exhaust gases | Yukihito Ichikawa, Yoshiyuki Kasai | 1997-01-21 |