Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12180035 | Elevator cab ventilation | Patricia Derwinski | 2024-12-31 |
| 11898776 | Elevator cab air purification | Patricia Derwinski | 2024-02-13 |
| 11440774 | Elevator roping sway damper assembly | Michael J. Tracey, Patricia Derwinski | 2022-09-13 |