Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5997830 | Method of purifying exhaust gas from internal combustion engine | Takashi Itoh, Yukio Kosaki | 1999-12-07 |
| 5358916 | Catalyst for purifying exhaust gas | Takashi Itoh | 1994-10-25 |