Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8182598 | Violet colorant for colour filters, inks for ink-jet electrophotographic toners and developers and e-inks | Heino Heckmann, Hans-Tobias Macholdt | 2012-05-22 |
| 7686883 | C.I. pigment blue 80-based blue dye | Peter Kempter, Sven Antes, Herbert Graf | 2010-03-30 |
| 7387670 | Pigment preparations based on phthalocyanine pigments | Joachim Weber, Manfred Opravil, Hans-Tobias Macholdt | 2008-06-17 |