Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6662124 | Protective relay with synchronized phasor measurement capability for use in electric power systems | Edmund O. Schweitzer, III, Luther S. Anderson, Armando Guzman-Casillas, Gregary C. Zweigle | 2003-12-09 |
| 6603298 | System for estimating the frequency of the power signal on a power transmission line | Armando Guzman-Casillas | 2003-08-05 |
| 6518767 | Line differential protection system for a power transmission line | Jeffrey B. Roberts, Hector Altuve-Ferrer, Ralph W. Folkers, Demetrios Tziouvaras | 2003-02-11 |