Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6555664 | Phthalimidyl azo pigments, method for producing same and utilisation thereof | Urs Lauk, Romeo Dreier, Alfons Arquint | 2003-04-29 |
| 6551363 | Azo dye mixtures | Alfons Arquint, Urs Lauk | 2003-04-22 |