Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4981489 | Disazo compounds and formulations containing same | Egon Liedek, Gerhard Berger, Hans W. Sonneborn | 1991-01-01 |
| 4894094 | Disazo compounds and formulations containing same | Egon Liedek, Gerhard Berger, Hans W. Sonneborn | 1990-01-16 |
| 4720304 | Pigment formulations | Egon Liedek, Gerhard Berger, Hans W. Sonneborn | 1988-01-19 |
| 4602960 | Modified diarylide pigments and their preparation | Egon Liedek, Gerhard Berger, Hans W. Sonneborn, Reinhard Kemper | 1986-07-29 |
| 4247296 | Diazo pigments | Egon Liedeck, Gerhard Berger, Peter REITER | 1981-01-27 |
| 4222788 | Mixed pigment and process of preparing the same | Egon Liedek, Peter Dimroth, Gerhard Berger, Peter REITER | 1980-09-16 |