Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4379834 | Process for cleaning copper-containing metal surfaces | Walter Herwig, Helga Sikora, Heide Sprengel | 1983-04-12 |
| 4304841 | Photopolymerizable mixture and photopolymerizable copying material produced therewith | Klaus Horn | 1981-12-08 |
| 4272609 | Photopolymerizable mixture | — | 1981-06-09 |
| 4241166 | Photopolymerizable composition comprising a monoazo dye as contrast colorant | Heide Sprengel, Walter Deucker, Hansjorg Vollmann | 1980-12-23 |
| 4233395 | Photopolymerizable transfer material | Heide Sprengel | 1980-11-11 |