Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5580458 | Method for waste water treatment using calcium carbonate mineral and microorganisms in combination | Kazuyuki Yamasaki, Yoshihiro Hamaguchi, Kazuyuki Sakata, Takashi Imai, Shigetoshi Okatani +6 more | 1996-12-03 |
| 5480537 | Apparatus for waste water treatment using calcium carbonate mineral and microorganisms in combination | Kazuyuki Yamasaki, Yoshihiro Hamaguchi, Kazuyuki Sakata, Takashi Imai, Shigetoshi Okatani +6 more | 1996-01-02 |
| 5423988 | Method and apparatus for treating developer-containing waste water at multiple biological treatment stages | Kazuyuki Yamasaki, Yoshihiro Hamaguchi, Kazuyuki Sakata, Satoshi Nishio, Takamasa Uchiyama | 1995-06-13 |