Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9996787 | Layered structure with conductive polymer for recognition of manipulation and process for the production thereof | — | 2018-06-12 |
| 7367592 | Marking substance and security markings for testing the authenticity of documents | Monika Puttkammer, Gunther Zscherpe | 2008-05-06 |
| 7301682 | Optically variable security attribute | — | 2007-11-27 |
| 7262604 | Method of testing documents provided with optico-diffractively effective markings | — | 2007-08-28 |
| 7133124 | Security element structure for documents, devices for checking documents with such security elements, method of the use thereof | — | 2006-11-07 |
| 7129709 | Method of testing documents provided with optico-diffractively effective markings | — | 2006-10-31 |
| 7116406 | Security element structure for documents, devices for checking documents with such security elements, method for the use thereof | — | 2006-10-03 |
| 7090917 | Security strips | — | 2006-08-15 |
| 5911298 | Multi-compact-sensor adapted for mounting at an ascending angle | Torsten Wolf | 1999-06-15 |