Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6492788 | Method and apparatus for encoderless operation of a permanent magnet synchronous motor in an elevator | Aleksandar M. Stankovic, Chris Czerwinski, Ed Piedra | 2002-12-10 |
| 6459599 | Determining phase of AC mains in PWM controlled converters without voltage sensors | Vladimir Blasko, Christopher S. Czerwinski, Jeffrey M. Izard, Edward Piedra | 2002-10-01 |