Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5221601 | Roomlight handleable UV sensitive direct positive silver halide photographic material | Marc Graindourze | 1993-06-22 |
| 5198333 | Photographic materials containing electron accepting agents | Jean-Marie Dewanckele, Paul Callant, Marc Graindourze | 1993-03-30 |
| 5122434 | Photographic roomlight materials containing halogen acceptors | Marc Graindourze, Jean-Marie Dewanckele | 1992-06-16 |