Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7758215 | PAR lamp with short arc HID bulb and cut-out in aluminum to prevent arcing | David A. Gwinn | 2010-07-20 |
| 5917289 | Lamp ballast with triggerless starting circuit | Louis R. Nerone, David J. Kachmarik | 1999-06-29 |
| 5619106 | Diodeless start circiut for gas discharge lamp having a voltage divider connected across the switching element of the inverter | — | 1997-04-08 |
| 5483125 | Ballast circuit for a gas discharge lamp having a cathode pre-heat arrangement | David J. Kachmarik, Louis R. Nerone, Kurt W. Haas | 1996-01-09 |
| 5479102 | Simulated load circuit for simulating the arc impedance of an electrodless discharge lamp | Sayed-Amr El-Hamamsy, Mark E. Duffy, Gerald E. Duffy | 1995-12-26 |
| 5440199 | Base for electrodeless discharge lamp | Raymond A. Heindl, Mark E. Duffy, Frederick Hetzel, David J. Marks, Lawrence T. Mazza +1 more | 1995-08-08 |
| 5382878 | Auto-starting system for an electrodeless high intensity discharge lamp | Edward J. Thomas, Sayed-Amr El-Hamamsy | 1995-01-17 |
| 5332970 | Method for measuring the impedance of an electrodeless arc discharge lamp | Sayed-Amr El-Hamamsy, Mark E. Duffy, Gerald E. Duffy | 1994-07-26 |
| 5059867 | Ballast circuit with improved transfer functions | Louis R. Nerone, Michael M. Minarczyk | 1991-10-22 |