Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5969303 | Emergency stop circuit for a direct current elevator drive | Gerard G. Piserchia | 1999-10-19 |
| 5893432 | Controlled emergency stop apparatus for elevators | Tac H. Nguyen | 1999-04-13 |
| 5717174 | Elevator brake drop silencing apparatus and method | — | 1998-02-10 |