Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |