Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6802395 | System for control and deceleration of elevator during emergency braking | Brad Helstrom, Don Afman | 2004-10-12 |
| 4898263 | Elevator self-diagnostic control system | Bradley W. Manske | 1990-02-06 |
| 4328550 | Programmer unit with composite calculation capability | — | 1982-05-04 |