Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6806704 | Devices and methods for investigating the magnetic properties of objects | Ulrich Schanda | 2004-10-19 |
| 6726813 | Security device and method for producing it | Wittich Kaule, Gregor Grauvogl, Friedrich Kretschmar | 2004-04-27 |
| 6382677 | Security element and method for producing same | Wittich Kaule, Gregor Grauvogl, Friedrich Kretschmar | 2002-05-07 |