Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5187054 | Anti-sludging compounds in photographic material | Jean-Marie Dewanckele | 1993-02-16 |
| 4288534 | Photographic silver halide materials containing light-absorbing dyes | Raymond Gerard Lemahieu, Henri Depoorter | 1981-09-08 |