ALEXANDRIA, Va., June 16 -- United States Patent no. 12,306,252, issued on May 20, was assigned to Hubbell Inc. (Shelton, Conn.).

"Apparatuses and methods for passive fault monitoring of current sensing devices in protective circuit interrupters" was invented by Gary Michael Miller (Kearneysville, W.va.), William Vernon Miller III (Aldie, Va.) and Edward Shi Chen (Camas, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Passive monitoring the integrity of current sensing devices and associated circuitry in GFCI and AFCI protective devices is provided. A protection circuit interrupter employs a capacitively coupled noise signal obtained by an arrangement of one or both of line side arms relative to a Rogow...