Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5909017 | Elevator energy conservation system | Ray W. Born | 1999-06-01 |
| RE32404 | Elevator with power recovery | — | 1987-04-21 |
| 4489812 | Power recovery system and method for elevator apparatus | — | 1984-12-25 |