Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5375026 | Method and device for preventing overstabilization of longitudinal differential protection in case of internal fault | Leif Eriksson | 1994-12-20 |
| 5367425 | Method and device for preventing understabilization of longitudinal differential protection in case of external fault and current transformer saturation | Per Wennerlund | 1994-11-22 |
| 5352983 | Method and apparatus for detecting flashover between conductors in power transmission lines of different voltage levels suspended in parallel from the same towers | Leif Eriksson | 1994-10-04 |
| 4731688 | Range limitation for a protection device in a power supply network | Gunnar Nimmersjo | 1988-03-15 |
| 4731689 | Directional detection in connection with faults in a power supply network | Gunnar Nimmersjo | 1988-03-15 |
| 4559491 | Method and device for locating a fault point on a three-phase power transmission line | — | 1985-12-17 |