Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6446759 | Door coupler and latch system for elevator car and landing doors | Richard E. Kulak | 2002-09-10 |
| 5881844 | Secondary positioning system for elevator car doors | Garnett H. Thompson, Richard N. Fargo, David K. Gentzler, Bennie J. Murah, James P. Towey | 1999-03-16 |
| 5862887 | High performance linear induction motor door operator | Bruce P. Swaybill, William L. King, Thomas M. Kowalczyk, Richard E. Kulak, K. Narasimha Reddy +1 more | 1999-01-26 |
| 5841082 | Secondary guidance system for linear induction motors driving elevator car doors | James A. Rivera | 1998-11-24 |
| 5819877 | Elevator evacuation deterrent device | James A. Rivera, Richard E. Kulak, Valery Sheynkman, Duane R. Stupienski, Blair J. Cohen | 1998-10-13 |
| 5756946 | Flexible mounting of a motor secondary in a linear induction motor for driving elevator car doors | James A. Rivera | 1998-05-26 |
| 5701973 | Linear belt door operator | — | 1997-12-30 |
| 5659160 | Linear belt door operator | — | 1997-08-19 |