Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5679503 | Method and device for the selective extraction of halide ions from photographic baths | Christian Guizard, Jean-Francois Diaz | 1997-10-21 |
| 5633125 | Process for extracting halide ions from fixing baths used in photography | — | 1997-05-27 |