Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4919905 | Process for the systematic treatment of exhaust gases | Shigechika Tomizawa, Yuji Kaihara | 1990-04-24 |
| 4897248 | Method for treating exhaust gas | Shigechika Tomisawa, Yukio Iida, Joji Tonomura | 1990-01-30 |
| 4728503 | Filter medium for treating an exhaust gas | Yukio Iida, Yuji Kaihara, Shigechika Tomisawa | 1988-03-01 |