Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7401817 | Invisible, machine-detectable security marking, production of the security marking, and security system comprising this security marking | Christoph Muller-Rees, Jurgen Kupfer, Georg Schwalb | 2008-07-22 |
| 6732961 | Method of producing platelets | Franz-Heinrich Kreuzer, Adolf Gurtner, Volker Stanjek | 2004-05-11 |
| 6570648 | Machine-detectable security marking with an increased level of proof against forgery, production of the security marking, and security system comprising this security marking | Christoph Muller-Rees, Jurgen Kupfer, Georg Schwalb | 2003-05-27 |
| 6358574 | Liquid-crystalline silicones having increased UV stability | Norman Haberle, Jurgen Kupfer | 2002-03-19 |
| 6224664 | Mixture comprising pigments having a liquid-crystalline structure with a chiral phase and its use | Christoph Muller-Rees, Eckhard Hanelt, Franz-Heinrich Kreuzer, Jurgen Kupfer | 2001-05-01 |
| 6071438 | Process for the production of three-dimensionally crosslinked polymeric materials having broad cholesteric reflection bands, and filters, reflectors and polarizers produced by this process | Eckhard Hanelt, Franz-Heinrich Kreuzer | 2000-06-06 |
| 5563298 | Stilbene-based materials, their preparation and use | Hans-Peter Weitzel, Peter Boldt, Jobst Leupold | 1996-10-08 |
| 5359439 | Optical elements based on liquid-crystalline substances with no birefringence in a non-perpendicular direction and a process for their preparation | Alfred Miller, Franz-Heinrich Kreuzer | 1994-10-25 |
| 5301045 | Helical liquid crystalline element which produces linear polarized light | Alfred Miller, Franz-Heinrich Kreuzer, Christoph Brauchle, Andreas Petri | 1994-04-05 |
| 5079149 | Process for the preparation of purple membrane containing bacteriorhodopsin | Stefan Neumann | 1992-01-07 |