Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4555724 | Elevator system | — | 1985-11-26 |
| 4482032 | Elevator emergency control system | Robert C. MacDonald | 1984-11-13 |
| 4473133 | Elevator system | Marjorie J. Polis | 1984-09-25 |
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4555724 | Elevator system | — | 1985-11-26 |
| 4482032 | Elevator emergency control system | Robert C. MacDonald | 1984-11-13 |
| 4473133 | Elevator system | Marjorie J. Polis | 1984-09-25 |