Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875150 | Parallel oscillatory circuit frequency converter with safety circuit | — | 1989-10-17 |
| 4612611 | Starting circuit for a parallel resonant circuit inverter | Hasso Wittenbecher | 1986-09-16 |
| 4549256 | Inverter arcing control for a parallel-resonant circuit static frequency changer | Hasso Wittenbecher | 1985-10-22 |
| 4346423 | Short circuit disconnecting circuit | Klaus Reifenrath | 1982-08-24 |
| 4331524 | Process and apparatus for electrolytic metal processing | — | 1982-05-25 |