Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6824965 | Bleach bath | Ralf Wichmann, Thomas Stetzer | 2004-11-30 |
| 6251574 | Color photographic developer concentrate | — | 2001-06-26 |
| 5976772 | Bleach-fixing bath for color photographic material | Ralf Weimann, Angelika Scholkmann, Erika Spriewald | 1999-11-02 |
| 5731133 | Process for the production of a chromogenically developed color photographic image using a compound capable of reacting with primary aromatic amines | Arno Schmuck | 1998-03-24 |