ALEXANDRIA, Va., June 2 -- United States Patent no. 12,646,931, issued on June 2, was assigned to DEHN SE (Neumarkt i.d.OPf., Germany).

"Surge arrester for DC mains and method of operating such a surge arrester" was invented by Klaus Buhler (Neumarkt, Germany), Arnd Ehrhardt (Neumarkt, Germany) and Marco Kellermann (Burgthann, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A surge arrester for DC mains comprises a spark gap for extinguishing mains follow currents in the DC mains, the current intensity of which is equal to or greater than a specified current threshold, and a triggerable extinguishing aid assigned to the spark gap, which is set up to extinguish mains follow currents below the specified...