Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9676592 | Traction elevator rope movement sensor system | Luther Wells, Scott Lahmers, Phillip Hampton | 2017-06-13 |
| 4832158 | Elevator system having microprocessor-based door operator | Mark Duckworth | 1989-05-23 |
| 4787481 | Hydraulic elevator having microprocessor-based, distributed control system | William M. Dugan | 1988-11-29 |