Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5861100 | Method of waste water treatment by flocculating sedimentation | — | 1999-01-19 |
| 5573670 | Method for treatment of waste water by activated sludge process | Hidetsugu Nakazawa | 1996-11-12 |
| 5160621 | Method for treatment of waste water by activated sludge process | Takao Hashimoto, Isao Takemura, Hiroshi Imai, Yasunobu Hirama, Tadayoshi Nakajima | 1992-11-03 |