Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5365396 | Negative sequence directional element for a relay useful in protecting power transmission lines | Edmund O. Schweitzer, III | 1994-11-15 |
| 5349490 | Negative sequence directional element for a relay useful in protecting power transmission lines | Edmund O. Schweitzer, III | 1994-09-20 |