Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875335 | Apparatus and method for treating an exhaust gas from a diesel engine | Yoshimasa Arai, Noriyuki Oda | 1989-10-24 |
| 4833883 | Filter unit, and apparatus for treating particulates in an exhaust gas from a diesel engine | Noriyuki Oda, Tetsuo Takehara | 1989-05-30 |