Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6801792 | Method for communication with a transportation system | Paul Friedli | 2004-10-05 |
| 6793044 | Travel sequence planning for elevators | Jana Koehler | 2004-09-21 |
| 6732839 | Contactless switching device for an elevator safety chain | — | 2004-05-11 |