Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6088136 | Method for producing index prints | Walter Kraft | 2000-07-11 |
| 5087937 | Photoelectric scanner | Beat Frick, Walter Kraft | 1992-02-11 |
| 4279505 | Method for print exposure control | Franz Zimmermann | 1981-07-21 |
| 4251156 | Method of and apparatus for making photographic prints | Franz Zimmermann | 1981-02-17 |