Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8264538 | Optically monitoring comb-line of escalators and moving walks | Reinhard Henkel | 2012-09-11 |
| 7681693 | Method for performing an elevator rescue run | Dirk H. Tegtmeier, Michael Mann, Kristian Bernhard Wittjen | 2010-03-23 |
| 5157228 | Adjusting technique for a digital elevator drive system | Bernd Ackermann, Peter Herkel, Mustapha Toutaoui | 1992-10-20 |
| 5155305 | Delayed start of elevator car deceleration and creep using VVVF technology | Jost-Ingo Eichberger | 1992-10-13 |
| 5137119 | Adaptive digital armature current control method for ward-leonard elevator drives using an SCR generator field converter | Mustapha Toutaoui | 1992-08-11 |
| 5076399 | Elevator start control technique for reduced start jerk and acceleration overshoot | Bernd Ackermann, Peter Herkel, Mustapha Toutaoui | 1991-12-31 |