ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,731,716, issued on Sept. 8, was assigned to ABB S.p.A. (Milan).

"Accessory device for low-voltage switches" was invented by Marco Tomasini (Sorisole, Italy) and Paolo Gallo (Palazzolo Acreide, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "An accessory device for a low-voltage switch is provided. The accessory device includes a power supply arrangement for providing a power supply to feed an electronic device onboard said switch, said power supply arrangement including a magnetic core, which forms a first magnetic circuit configured to be enchained with a primary winding conductor, and a first secondary winding conductor, which is wound around sai...