ALEXANDRIA, Va., April 15 -- United States Patent no. 12,603,490, issued on April 14, was assigned to Schweitzer Engineering Laboratories Inc. (Pullman, Wash.).

"Protective device with multi-channel line current differential protection" was invented by Cole Salo (Butte, Mont.), Austin Edward Wade (Moscow, Idaho) and William Glennon (Billings, Mont.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The presently described systems and methods include differential protection architectures for power lines, including three-phase transmission lines and distribution lines, in which each protective device monitors and protects more than one power line. A protective device with multi-channel line current differential pr...