Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11345569 | Rescue/evacuation self-testing system for traction elevators | James C. Hall | 2022-05-31 |
| 11084688 | Rescue/evacuation self-testing system for traction elevators | James C. Hall | 2021-08-10 |