Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4981489 | Disazo compounds and formulations containing same | Wolfgang Ruff, Egon Liedek, Gerhard Berger | 1991-01-01 |
| 4894094 | Disazo compounds and formulations containing same | Wolfgang Ruff, Egon Liedek, Gerhard Berger | 1990-01-16 |
| 4720304 | Pigment formulations | Wolfgang Ruff, Egon Liedek, Gerhard Berger | 1988-01-19 |
| 4602960 | Modified diarylide pigments and their preparation | Egon Liedek, Wolfgang Ruff, Gerhard Berger, Reinhard Kemper | 1986-07-29 |