Issued Patents All Time
Showing 25 most recent of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12378095 | System and method of unlocking and opening multiple panel elevator doors | James Chmiel | 2025-08-05 |
| 12091283 | Elevator door astragal | Colette Ruden | 2024-09-17 |
| 11845631 | Synchronizing assembly for elevator door and elevator | Zhiren Liu, Meihong Mao, Yunbin Cai, Jinkoo Lee | 2023-12-19 |
| 11795033 | Elevator car door interlock | Richard E. Kulak | 2023-10-24 |
| 11760604 | Versatile elevator door interlock assembly | — | 2023-09-19 |
| 11661315 | Monitoring system, elevator door system having monitoring system, and method | Richard E. Kulak | 2023-05-30 |
| 11655122 | Elevator door in interlock assembly | Richard E. Kulak | 2023-05-23 |
| 11572251 | Elevator door sensor fusion, fault detection, and service notification | Walter Thomas Schmidt, Abdelilah Sakti | 2023-02-07 |
| 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 |
| 11124389 | Elevator car door interlock | Richard E. Kulak | 2021-09-21 |
| 11072515 | Automated elevator maintenance mode initiation | Tadeusz Pawel Witczak | 2021-07-27 |
| 11046557 | Elevator door interlock assembly | Richard E. Kulak | 2021-06-29 |
| 11040858 | Elevator door interlock assembly | Richard E. Kulak | 2021-06-22 |
| 11034548 | Elevator door interlock assembly | Richard E. Kulak | 2021-06-15 |
| 10882720 | Elevator car door interlock | Richard E. Kulak | 2021-01-05 |
| 10837215 | Zone object detection system for elevator system | Walter Thomas Schmidt, Enrico Manes, Norbert Antony Murray Hootsmans | 2020-11-17 |
| 10710843 | Car door interlock with sill lock | Richard E. Kulak | 2020-07-14 |
| 10569994 | Monitoring system, elevator door system having monitoring system, and method | Richard E. Kulak | 2020-02-25 |
| 8272481 | Guide assembly for at least one elevator door | Richard E. Kulak | 2012-09-25 |
| 7650970 | Elevator door lock sensor device including proximity sensor elements in a selected geometric pattern | Muhidin A. Lelic, Pei-Yuan Peng, Bryan Robert Siewert, Jacek F. Gieras, Thomas Malone | 2010-01-26 |
| 7543686 | Elevator with rollers having selectively variable hardness | Richard E. Kulak | 2009-06-09 |