Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8206595 | Method of recovering silver using anion-exchange resin | Yoshifumi Abe | 2012-06-26 |
| 5865967 | Cathode plate used for hydro-electro-winning or electro-refining | Akira Ikeda, Toshinori Ishii | 1999-02-02 |
| 5783057 | Method of purifying copper electrolytic solution | Masatoshi Tomita, Toshinori Ishii | 1998-07-21 |