Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5869224 | Processing of reversal materials | — | 1999-02-09 |
| 5858631 | Processing color photographic materials | Udo Quilitzsch | 1999-01-12 |
| 5135841 | Process for the production of color photographic copies | Ubbo Wernicke, Udo Quilitzsch | 1992-08-04 |
| 5006439 | Photographic reversal process using a color developing agent in the black-and-white developer | Ubbo Wernicke | 1991-04-09 |
| 4997749 | Overflow-free color photographic development system | Ubbo Wernicke | 1991-03-05 |