Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7636438 | Data medium authentication method | Hermann Drexler, Wolfgang Rankl, Franz Weikmann, Wolfgang Effing | 2009-12-22 |
| 6343743 | Method of checking authenticity of a data carrier | — | 2002-02-05 |
| 5917909 | System for testing the authenticity of a data carrier | — | 1999-06-29 |
| 5850524 | Method for testing the authenticity of a data carrier | Wolfgang Rankl, Franz Weikmann, Wolfgang Effing | 1998-12-15 |
| 5763869 | Data carrier having an electronic module | Jürgen Moll, Franz Weikmann | 1998-06-09 |