Issued Patents All Time
Showing 25 most recent of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11795033 | Elevator car door interlock | Michael J. Tracey | 2023-10-24 |
| 11661315 | Monitoring system, elevator door system having monitoring system, and method | Michael J. Tracey | 2023-05-30 |
| 11655122 | Elevator door in interlock assembly | Michael J. Tracey | 2023-05-23 |
| 11254542 | Car door interlock | Michael J. Tracey | 2022-02-22 |
| 11247872 | Elevator car door interlock | Michael J. Tracey | 2022-02-15 |
| 11124389 | Elevator car door interlock | Michael J. Tracey | 2021-09-21 |
| 11046557 | Elevator door interlock assembly | Michael J. Tracey | 2021-06-29 |
| 11040858 | Elevator door interlock assembly | Michael J. Tracey | 2021-06-22 |
| 11034548 | Elevator door interlock assembly | Michael J. Tracey | 2021-06-15 |
| 10882720 | Elevator car door interlock | Michael J. Tracey | 2021-01-05 |
| 10710843 | Car door interlock with sill lock | Michael J. Tracey | 2020-07-14 |
| 10569994 | Monitoring system, elevator door system having monitoring system, and method | Michael J. Tracey | 2020-02-25 |
| 10486940 | Alignment system for an elevator car | Tadeusz Pawel Witczak, Bruce P. Swaybill, Zbigniew Piech, Richard J. Ericson | 2019-11-26 |
| 8272481 | Guide assembly for at least one elevator door | Michael J. Tracey | 2012-09-25 |
| 7543686 | Elevator with rollers having selectively variable hardness | Michael J. Tracey | 2009-06-09 |
| 6457569 | Rotary actuated overspeed safety device | James M. Draper | 2002-10-01 |
| 6446759 | Door coupler and latch system for elevator car and landing doors | Michael J. Tracey | 2002-09-10 |
| 6296080 | Variable traction mechanism for rotary actuated overspeed safety device | James M. Draper | 2001-10-02 |
| 5880414 | Elevator door brake, brake, lock, and hold-open | Jerome F. Jaminet, Thomas M. Kowalczyk, Frank Guliuzza, Jr., Edward E. Ahigian, Thomas M. McHugh +3 more | 1999-03-09 |
| 5862887 | High performance linear induction motor door operator | Bruce P. Swaybill, William L. King, Thomas M. Kowalczyk, Michael J. Tracey, K. Narasimha Reddy +1 more | 1999-01-26 |
| 5819877 | Elevator evacuation deterrent device | James A. Rivera, Michael J. Tracey, Valery Sheynkman, Duane R. Stupienski, Blair J. Cohen | 1998-10-13 |
| 5808246 | Triac drive for three-phase line-powered linear induction motor elevator door operator | Richard E. Peruggi, Thomas M. McHugh, Edward E. Ahigian, Jerome F. Jaminet, Thomas He +3 more | 1998-09-15 |
| 5736693 | Elevator door drive using dual secondary linear induction motor | Zbigniew Piech, Jerome F. Jaminet, Thomas M. Kowalczyk, Edward E. Ahigian, Thomas M. McHugh +3 more | 1998-04-07 |
| 5732796 | Elevator car evacuation deterrent device | Edward E. Ahigian, David W. Barrett, Thomas M. McHugh, Jerome F. Jaminet, Thomas He +2 more | 1998-03-31 |
| 5682023 | Time-optimal control of an AC line-driven linear motor elevator door operator | Thomas M. McHugh, Richard E. Peruggi, Edward E. Ahigian, Jerome F. Jaminet, Thomas He +2 more | 1997-10-28 |