Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5639362 | Apparatus and method for de-silvering a silver-containing solution | Benedictus Jansen | 1997-06-17 |
| 5605632 | Silver recovery device and process | Benedictus Jansen, Frank Michiels | 1997-02-25 |