Issued Patents All Time
Showing 1–4 of 4 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, Frank Theeg | 2023-08-01 |
| 11587339 | Method for reading a code stored in a halftone image and comparison with a retrievable value | Jörg Kaufmann, Frank Theeg | 2023-02-21 |
| 6697394 | Directly modulatable laser | Andreas Tuennermann, Jens-Peter Ruske | 2004-02-24 |
| 5864645 | Double-core light-conducting fiber, process for producing the same, double-core fiber laser, and double-core fiber amplifier | Joern Bonse, Sonja Unger, Volker Reichel | 1999-01-26 |