Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878185 | Digital measuring instrument | Klaus Brand, Fritz Wittwer | 1989-10-31 |
| 4767941 | Method for error-protected actuation of the switching devices of a switching station and an apparatus thereof | Klaus Brand, Wolfgang Wimmer | 1988-08-30 |
| 4689708 | Zone protective directional relay scheme | Helmut Hager, Kurt Zwahlen | 1987-08-25 |
| 4449244 | Data transmission network employing optical wave guide | — | 1984-05-15 |