Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6903197 | Azoxy dyes and copper complexes thereof | Rainer Tresch, Karl-Heinz Etzbach, Rudiger Sens | 2005-06-07 |
| 6727351 | Azoxy dyes and their Cu complexes | Rainer Tresch, Karl-Heinz Etzbach, Rudiger Sens | 2004-04-27 |
| 6616712 | Use of compositions containing bisazo compounds for detecting fissures | Karin H. Beck, Christos Vamvakaris, Karl-Heinz Etzbach, Gerhard Scholz | 2003-09-09 |
| 6302924 | Dye mixtures containing thienyl and/or thiazolazo dyes | Karl-Heinz Etzbach, Rudiger Sens, Frank Wuthner | 2001-10-16 |
| 5827332 | Azo dyes and a method of making a hydrocarbon using an azo dye | Georg Zeidler, Gerhard Scholz, Karin H. Beck, Udo Mayer | 1998-10-27 |