Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849850 | Circuit for protecting electronic devices against overload | — | 1989-07-18 |
| 4799138 | Circuit for producing an alternating voltage | Ziaedin Chahabadi, Olaf Wittur | 1989-01-17 |