Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837671 | State signal formation for indicating the transition into the bypass mode of operation in an apparatus for high-voltage D-C transmission | Georg Wild, Manfred Weibelzahl, Martin Haushofer, Johann Messner | 1989-06-06 |