| 11404954 |
Pulse width modulation interleaving |
Da Zhang, Thomas Bekasi, Ismail Agirman, Bassel Al-Annouf, Christopher S. Czerwinski |
2022-08-02 |
| 10654682 |
Conveyance system having paralleled drives |
Ismail Agirman, HanJong Kim |
2020-05-19 |
| 8127894 |
Elevator motor drive tolerant of an irregular power source |
Ismail Agirman, Christopher S. Czerwinski, Edward Piedra, Vladimir Blasko, Frank Higgins +1 more |
2012-03-06 |
| 8006808 |
Managing an encoder malfunction in an elevator drive system |
Edward Piedra, Ismail Agirman |
2011-08-30 |
| 6601679 |
Two-part wireless communications system for elevator hallway fixtures |
David Crenella, Michael Gozzo, Richard Robert Grzybowski, Robert G. Morgan, Chester J. Slabinski |
2003-08-05 |
| 6459599 |
Determining phase of AC mains in PWM controlled converters without voltage sensors |
Ismail Agirman, Vladimir Blasko, Christopher S. Czerwinski, Edward Piedra |
2002-10-01 |
| 5631452 |
System for position loss recovery for an elevator car |
Eric K. Jamieson, Christopher Pietrzykowski |
1997-05-20 |