Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878562 | Group control for elevators with load dependent control of the cars | — | 1989-11-07 |
| 4869348 | Group control for elevators with immediate allocation of calls of destination | — | 1989-09-26 |
| 4864208 | Actual position signal generator for the position control circuit of an elevator drive | — | 1989-09-05 |
| 4858745 | Escalator steps having lateral safety devices | Max Haas | 1989-08-22 |
| 4836336 | Elevator system floor call registering circuit | — | 1989-06-06 |