Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6871727 | Elevator system with one or more cars moving independently in a same shaft | Simo Jokela, Johannes De Jong | 2005-03-29 |
| 6854565 | Method for monitoring the door mechanism of an elevator | Pekka Perälä, Seppo Suur-Askola, Pekka Torenius | 2005-02-15 |
| 5239142 | Selection of an elevator for service based on passenger location and elevator travel time | Ralf Ekholm | 1993-08-24 |
| 4895223 | Method for sub-zoning an elevator group | Ralf Ekholm | 1990-01-23 |