Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693919 | Evacuation system for elevators | Edmund Sager | 1997-12-02 |
| 5612519 | Method and apparatus for assigning calls entered at floors to cars of a group of elevators | — | 1997-03-18 |