Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6413417 | Waste water treatment apparatus | Kazuyuki Yamasaki, Seiji Okamoto, Yukihiro Tao | 2002-07-02 |
| 6344142 | Waste water treatment method and apparatus | Kazuyuki Yamasaki, Norio Sawai | 2002-02-05 |