Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4422752 | Method of and an apparatus for classifying color films | Siegfried Thurm | 1983-12-27 |
| 4344704 | Method of determining correction parameters for use in light-amount adjustment in a color copying operation | Siegfried Thurm | 1982-08-17 |
| 4279502 | Method of and apparatus for determining the copying light amounts for copying from color originals | Siegfried Thurm, Gunter Findeis | 1981-07-21 |
| 4274732 | Method and apparatus for making reproductions of color film frames | Siegfried Thurm | 1981-06-23 |
| 4217648 | Method and apparatus for evaluating color photographic negatives prior to copying | Siegfried Thurm | 1980-08-12 |