Issued Patents 2022
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11440774 | Elevator roping sway damper assembly | Cuauhtemoc Castro Inzunza, Patricia Derwinski | 2022-09-13 |
| 11390487 | Automated elevator safety chain diagnosis | Leslie C. Watterson | 2022-07-19 |
| 11390492 | Method and assembly for positioning an elevator door interlock | Erik Khzouz | 2022-07-19 |
| 11254542 | Car door interlock | Richard E. Kulak | 2022-02-22 |
| 11247872 | Elevator car door interlock | Richard E. Kulak | 2022-02-15 |