ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,385,957, issued on Aug. 12, was assigned to Bender GmbH & Co. KG (Gruenberg, Germany).

"Method for computing an insulation resistance in an ungrounded DC power supply system at a changeable DC line voltage" was invented by Burkhard Macht (Hungen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method is provided for computing an insulation resistance (Rf) in an ungrounded DC power supply system (2) at a changeable DC line voltage (Un1, Un2). In two consecutive measurements at the point in time of the respective settled state of a first and second pulse amplitude (Ug1, Ug2) of a measuring voltage (Ug) superposed on the DC power supply system (2)...