Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6820446 | Sewage disposal agent, sewage purifier, washing machine with purifier, and sewage purifying method | Nobushige Arai, Hirofumi Yoshikawa, Shinya Takagi, Ichiro Ohshima, Rie Hiramoto | 2004-11-23 |