Issued Patents All Time
Showing 51–60 of 60 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, Gregary C. Zweigle, Gabriel Benmouyal | 2003-12-09 |
| 6608742 | Voltage and current source selection system for use in the protection, automation and control of an electric power system | Edmund O. Schweitzer, III, Jeffrey B. Roberts, Joseph B. Mooney, Luther S. Anderson | 2003-08-19 |
| 6603298 | System for estimating the frequency of the power signal on a power transmission line | Gabriel Benmouyal | 2003-08-05 |
| 6411865 | System for protection zone selection in microprocessor-based relays in an electric power system | Bai-Lin Qin | 2002-06-25 |
| 6356421 | System for power transformer differential protection | Hector Altuve-Ferrer, Stanley E. Zocholl, Gabriel Benmouyal | 2002-03-12 |
| 6341055 | Restraint-type differential relay | — | 2002-01-22 |
| 6028754 | System for preventing undesired protective relay tripping actions due to coupling capacitor voltage transformer transients | Jeffrey B. Roberts | 2000-02-22 |
| 5963404 | Restricted earth fault protection for transformers using a directional element | Luther S. Anderson | 1999-10-05 |
| 5731943 | Protective relay having out-of-step logic capability | Jeffrey B. Roberts, Daqing Hou | 1998-03-24 |
| 5694281 | Zero sequence voltage-polarized directional element for protective relays | Jeffrey B. Roberts | 1997-12-02 |