Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7222788 | Method for registering tickets and electronic ticket | Alfred Lauper | 2007-05-29 |
| 7143049 | Method and system for registering tickets | Rolf Bachtiger, Christoph Cronimund, Gerard Salzgeber, Reto Schreppers, Willi Brandli +1 more | 2006-11-28 |
| 5649010 | Send filter for an echo canceler | Peter Gysel, August Kaelin, Daniel Mueller | 1997-07-15 |
| 5633863 | Echo canceler | Peter Gysel, August Kalin, Daniel Muller | 1997-05-27 |
| 4691327 | Clock regenerator | — | 1987-09-01 |
| 4605822 | Active equalization circuit | Johann Amstutz | 1986-08-12 |