Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6669740 | Dye preparations comprising azo dyes | Karl Siemensmeyer, Volker Bach, Manfred Herrmann, Günther König, Rudiger Sens | 2003-12-30 |
| 6607565 | Colorant preparations | Manfred Herrmann, Karl Siemensmeyer | 2003-08-19 |
| 6537331 | Dye preparations containing azo dyes | Karl Siemensmeyer, Volker Bach, Manfred Herrmann, Günther König, Rudiger Sens | 2003-03-25 |