Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7468586 | Ballast with arc protection circuit | Qinghong Yu, John G. Konopka, Joseph L. Parisella | 2008-12-23 |
| 7288901 | Ballast with arc protection circuit | Qinghong Yu, John G. Konopka, Joseph L. Parisella | 2007-10-30 |
| 7276859 | Three-phase electronic ballast with improved three-phase EMI filter | — | 2007-10-02 |
| 7102297 | Ballast with end-of-lamp-life protection circuit | Joseph L. Parisella | 2006-09-05 |
| 6906474 | Three-phase electronic ballast | Joseph L. Parisella, Richard Koeppl | 2005-06-14 |
| 6680585 | Method and apparatus for modulating HID ballast operating frequency using DC bus ripple voltage | — | 2004-01-20 |
| 6680587 | Electronic ballast with adaptable charge pump power factor correction | Joseph L. Parisella, Richard Koeppl | 2004-01-20 |
| 6181076 | Apparatus and method for operating a high intensity gas discharge lamp ballast | David L. Bay | 2001-01-30 |