Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5186146 | Combustion evaluation apparatus and combustion controller | Kenichi Sohma, Shigeru Azuhata, Norio Arashi, Hiroatsu Tokuda | 1993-02-16 |
| 4293521 | Apparatus for cleaning waste flue gases | Fumio Isahaya | 1981-10-06 |
| 4208381 | Method and apparatus for cleaning waste flue gases | Fumio Isahaya | 1980-06-17 |