Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6429668 | Switching element produced in the form of a film | Karl Billen, Laurent Federspiel | 2002-08-06 |
| 6289747 | Pressure-sensitive area sensor | Karl Billen, Laurent Federspiel, Reinhard Knecht | 2001-09-18 |