Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887200 | Method and apparatus for determining the actual value of the margin-angle in the valves of an inverter | — | 1989-12-12 |
| 4665474 | Method and device for rapidly determining a synchronous reference voltage for a network controlled converter | — | 1987-05-12 |
| 4648018 | Method and apparatus to operate a high-voltage DC transmission system (HVDC) with automatic control of the converters | — | 1987-03-03 |
| 4638415 | Method and apparatus for resumption of normal operation of a high-voltage D. C. transmission line | — | 1987-01-20 |
| 4638416 | Method and apparatus for high-voltage D.C. transmission with a bypass circuit for malfunctions | Wolfgang Kaufhold, Georg Wild | 1987-01-20 |