Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5252790 | Method and apparatus for processing calls entered in elevator cars | — | 1993-10-12 |
| 5056628 | Apparatus and method for processing calls entered in elevator cars | — | 1991-10-15 |
| 5005671 | Apparatus for damping oscillations in elevator cars | Edmund Sager | 1991-04-09 |