Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6827941 | Use of carotenoid aggregates as colorants | Erik Luddecke, Helmut Auweter | 2004-12-07 |
| 6733680 | Use of particulate polymers as filter aids for aqueous liquids | Helmut Witteler, Christian Drohmann, Axel Sanner, Karl Kolter | 2004-05-11 |