Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4371440 | Method of treating a waste water rich in protein | Kiyoshi Yoshizawa, Kenichi Otsuka, Takeo Koizumi, Katsuyoshi Mitsutomi, Seiji Nakamura | 1983-02-01 |
| 4311721 | Method of purifying distillers solubles and use of the purified matter | Kiyoshi Yoshizawa, Masamitsu Itoh, Hiroshi Kiuchi, Kazuo Horii | 1982-01-19 |
| 4278699 | Method of purifying distillers solubles and use of the purified matter | Kiyoshi Yoshizawa, Masamitsu Itoh, Hiroshi Kiuchi, Kazuo Horii | 1981-07-14 |
| 4237232 | Method of purifying distillers solubles and use of the purified matter | Kiyoshi Yoshizawa, Masamitsu Itoh, Hiroshi Kiuchi, Kazuo Horii | 1980-12-02 |
| 4183807 | Treatment of waste water rich in nutrients | Kiyoshi Yoshizawa, Katsuyoshi Mitsutomi, Hiroshi Hashimoto, Akira Noguchi, Kazuo Tanno | 1980-01-15 |