Issued Patents All Time
Showing 1–10 of 10 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 |
| 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 |
| 6486616 | Dual control dimming ballast | Guang Liu | 2002-11-26 |
| 6144539 | Arrangement for protecting low-voltage control circuitry from externally applied high voltages, and dimming ballast employing such an arrangement | John G. Konopka | 2000-11-07 |
| 5883473 | Electronic Ballast with inverter protection circuit | Edward Li | 1999-03-16 |
| 5869935 | Electronic ballast with inverter protection circuit | — | 1999-02-09 |
| 5770925 | Electronic ballast with inverter protection and relamping circuits | John G. Konopka | 1998-06-23 |
| 5757166 | Power factor correction controlled boost converter with an improved zero current detection circuit for operation under high input voltage conditions | — | 1998-05-26 |