Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6768274 | Ballast with lamp-to-earth-ground fault protection circuit | John G. Konopka | 2004-07-27 |
| 6727662 | Dimming control system for electronic ballasts | John G. Konopka, Sivakumar Thangavelu | 2004-04-27 |