Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6139803 | Photocatalytic air treatment process under room light | Toshiya Watanabe, Eiichi Kojima, Kazuhito Hashimoto, Akira Fujishima | 2000-10-31 |
| 5874701 | Photocatalytic air treatment process under room light | Toshiya Watanabe, Eiichi Kojima, Kazuhito Hashimoto, Akira Fujishima | 1999-02-23 |