Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6696800 | High frequency electronic ballast | Jerry Kramer, Jerzy Janczak, Hendrik Anton Van Esveld | 2004-02-24 |
| 6686703 | High frequency electronic ballast | Robert Erhardt, Oscar Deurloo, Jerzy Janczak, Hendrik Anton Van Esveld, Winston Donald Couwenberg | 2004-02-03 |