Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7494588 | Wastewater purification system | Sakujiro Nakamura, Seiji Yokoi | 2009-02-24 |
| 4427772 | Apparatus having automatic calibration for determining hydrogen peroxide concentration | Toshiaki Ishii, Minoru Ohashi | 1984-01-24 |