Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6657400 | Ballast with protection circuit for preventing inverter startup during an output ground-fault condition | John G. Konopka, Himamshu Prasad | 2003-12-02 |
| 6534931 | Dimming control system for electronic ballasts | John G. Konopka | 2003-03-18 |