Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9828211 | Actively damping vertical oscillations of an elevator car | — | 2017-11-28 |
| 7204347 | Arrhythmic pulse sequence for sonic distance measurement | Peter Herkel | 2007-04-17 |
| 6170614 | Electronic overspeed governor for elevators | Peter Herkel | 2001-01-09 |
| 6079521 | Measuring elevator position with scanning laser beam | Peter Herkel | 2000-06-27 |
| 6037686 | Current compensated choke filter for multi-phase motor drives | Robert Oesterle, Christoph M. Ernecke | 2000-03-14 |
| 5883345 | Sonic position measurement system | Stefan Spannhake | 1999-03-16 |
| 5841083 | Blocked door detection for an elevator system | Helmut Schroder-Brumloop | 1998-11-24 |