Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5079485 | Ballast for supplying a plurality of discharge lamps | Fred Hasemann, Ferdinand Mertens | 1992-01-07 |
| 4914355 | D.C. voltage supply circuit for fluorescent lamps | Ferdinand Mertens, Fred Hasemann | 1990-04-03 |
| 4806843 | D.C. voltage supply circuit | Ferdinand Mertens, Fred Hasemann | 1989-02-21 |