Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 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, Michael J. Tracey | 2010-01-26 | $26,206,000 |
| 6630886 | Top of elevator car inspection station with alarm | — | 2003-10-07 | $64,693,000 |
| 6481534 | Apparatus for maintaining adequate overhead space for car top mechanics in elevator systems | — | 2002-11-19 | $17,857,000 |
| 6481537 | Rooftop safety apparatus for elevator servicing | Robert Isaman | 2002-11-19 | $17,857,000 |
| 6305502 | Elevator cab floor acceleration control system | Thomas He | 2001-10-23 | $39,399,000 |