Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4501344 | Speed pattern generator for an elevator car | Matthew F. Kersen | 1985-02-26 |
| 4494628 | Elevator system | Matthew F. Kersen | 1985-01-22 |
| 4457404 | Elevator system | Alan L. Husson | 1984-07-03 |
| 4416352 | Elevator system | Alan L. Husson | 1983-11-22 |