Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9776828 | Device for the position detection of an elevator car and method for operating an elevator system | Frank Muller | 2017-10-03 |
| 9718642 | Device for detecting position of an elevator car with mechanical switching means | Frank Muller | 2017-08-01 |
| 6874244 | Elevator installation with a measuring system for determining absolute car position | Eric Birrer, Frank Muller | 2005-04-05 |