Issued Patents 2023
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11715309 | Method for producing security elements in an image which are not visible to the human eye and cannot be copied, and printed image | Jörg Kaufmann, Holger Zellmer | 2023-08-01 |
| 11587339 | Method for reading a code stored in a halftone image and comparison with a retrievable value | Jörg Kaufmann, Holger Zellmer | 2023-02-21 |