Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6489729 | Auxiliary lighting system for high intensity discharge lamp | Robert Erhardt, Ching-Yao Hung, Raymond Kulka, Seymour Perkins, III | 2002-12-03 |
| 6414446 | Switching device | Markus Krijzer | 2002-07-02 |
| 6373199 | Reducing stress on ignitor circuitry for gaseous discharge lamps | Robert Erhardt | 2002-04-16 |