Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888674 | Method and apparatus for decoupling the active and reactive power control for a high voltage DC transmission line coupling two networks | Manfred Weibelzahl | 1989-12-19 |
| 4837671 | State signal formation for indicating the transition into the bypass mode of operation in an apparatus for high-voltage D-C transmission | Rembert Kohler, Manfred Weibelzahl, Martin Haushofer, Johann Messner | 1989-06-06 |