Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4785914 | Elevator system leveling safeguard control and method | Jeffrey W. Blain | 1988-11-22 |
| 4648488 | Elevator system | Matthew Martin | 1987-03-10 |
| 4638889 | Elevator system | Joanne E. Mikhail | 1987-01-27 |
| 4463833 | Elevator system | Linus R. Dirnberger, Alan L. Husson | 1984-08-07 |
| 4436185 | Elevator system | Wing C. Quan, Alan L. Husson, Linus R. Dirnberger, Marjorie J. Polis | 1984-03-13 |
| 4317506 | Elevator system | Wing C. Quan | 1982-03-02 |