Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4898810 | Layers for photographic materials | Ute Eggert, Andreas Engel | 1990-02-06 |
| 4254215 | Process for the prevention of darkening and the formation of a sediment in photographic developer solutions | John Lenoir, Max Marthaler | 1981-03-03 |