Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7195022 | Production apparatus for producing gallium nitride semiconductor film and cleaning apparatus for exhaust gas | Kenji Otsuka, Kikurou Takemoto | 2007-03-27 |
| 6579509 | Method of cleaning of harmful gas and cleaning apparatus | Kenji Otsuka, Satoshi Arakawa, Tomohisa Ikeda | 2003-06-17 |