Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10895743 | Display apparatus for superimposing a virtual image into the field of vision of a user | — | 2021-01-19 |
| 10076921 | Document with hologram, and method of producing same | Irina Menz, Andreas Wanke, Philippe Huet, Hugues Souparis | 2018-09-18 |
| 8810766 | Method and device for producing contact copies | — | 2014-08-19 |
| 8599458 | Method and apparatus for the production of volume transmission and/or reflection holograms | — | 2013-12-03 |
| 8077364 | Security system, particularly for valuable documents | Irina Menz, Benedikt Ahlers, Arnim Franz-Burgholz | 2011-12-13 |
| 8059320 | Method for production of documents with a hologram and a document with a hologram | Irina Menz | 2011-11-15 |
| 7724408 | Security system, especially for security documents | Irina Menz, Benedikt Ahlers, Arnim Franz-Burgholz | 2010-05-25 |
| 7315407 | Security system, particularly for valuable documents | Irina Menz, Benedikt Ahlers, Arnim Franz-Burgholz | 2008-01-01 |
| 6750465 | Device for evaluating diffractive authenticity features | Arnim Franz-Burgholz, Roland Gutmann, Harald Hoeppner, Thomas Loer, Detlef Martens +5 more | 2004-06-15 |
| 5943131 | Method for checking authenticity of a hologram and a reading device for the performance of the method | Zishao Yang | 1999-08-24 |
| 5943144 | Process for the manufacture of non-replicable holograms possessing authenticity features and a reading device to check authenticity | Klaus Gnadig, Zishao Yang | 1999-08-24 |
| 5026132 | Method of producing and reproducing holograms | — | 1991-06-25 |
| 4989929 | Process of making an achromatic hologram which is adapted to be reconstructed with white light | Rudi T. de Jongh, Klaus Gnadig | 1991-02-05 |
| 4730929 | Method and device for the contactless measurement of movement | — | 1988-03-15 |