Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7879246 | Water treatment apparatus | Yukio Doi, Koichi Matsuo, Toshiyuki Iwama, Yoichiro Shimizu | 2011-02-01 |
| 7622042 | Water treatment apparatus and method | Eiichi Suzuki, Yukio Doi, Hayato Kurokawa, Toshiyuki Iwama | 2009-11-24 |
| 7455775 | Water treatment method and apparatus | Eiichi Suzuki, Yukio Doi, Hayato Kurokawa, Toshiyuki Iwama | 2008-11-25 |