Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889697 | Method of refining ferrous ion-containing acid solution | Tsutomu Fukushima, Tsugio Nakao, Takao Komuro, Katsuhiro Nishi | 1989-12-26 |
| 4377483 | Method of removing dissolved heavy metals from aqueous waste liquids | Takao Ikehata, Kazuhiko Tate, Keisuke Nakahara | 1983-03-22 |