Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4247296 | Diazo pigments | Egon Liedeck, Wolfgang Ruff, Gerhard Berger | 1981-01-27 |
| 4222788 | Mixed pigment and process of preparing the same | Egon Liedek, Peter Dimroth, Wolfgang Ruff, Gerhard Berger | 1980-09-16 |