Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11448409 | Device and method for purifying air purification device and method | Kitae Park, Jinkyu Kang, Haruhiko Yamasaki, Masaaki Okubo, Tadao Yagi +3 more | 2022-09-20 |
| 8574506 | Method and apparatus for processing exhaust gas | Masaaki Okubo, Toshiaki Yamamoto, Hidekatsu Fujishima, Keiichi Otsuka | 2013-11-05 |
| 7521031 | Method and apparatus for treating exhaust gas | Masaaki Okubo, Toshiaki Yamamoto | 2009-04-21 |