Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9104176 | Method for the production of a multi-color volume hologram, a document with such a hologram, and a volume hologram master | Zishao Yang | 2015-08-11 |
| 8263292 | Method for producing counterfeit-proof confidential and valuable documents | Irina Menz | 2012-09-11 |
| 7420720 | Optical element and method for the production thereof | Irina Menz | 2008-09-02 |
| 7149013 | Optical element and method for the production thereof | Irina Menz | 2006-12-12 |
| 6876472 | Optical feature, in particular for documents of value, and a manufacturing method for the later individualization or data storage | Irina Menz | 2005-04-05 |
| 6392766 | Screen for front laser projection | Klaus Gnaedig, Thorstein Halldorsson | 2002-05-21 |
| 6313931 | Screen for laser rear projection | Klaus Gnaedig, Thorstein Halldorsson | 2001-11-06 |
| 5896208 | Master hologram for the production of copy-proof holograms | Klaus Gnaedig | 1999-04-20 |
| 5825514 | Master hologram for the production of copy-proof holograms | Klaus Gnaedig | 1998-10-20 |