Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814962 | Zero voltage switching half bridge resonant converter | Roman Ostapiak, Ralph Walk, Norman Gerard Ziesse | 1989-03-21 |
| 4685041 | Resonant rectifier circuit | Wayne C. Bowman, Weyman B. Suiter, Jr., Norman Gerard Ziesse | 1987-08-04 |