ALEXANDRIA, Va., July 15 -- United States Patent no. 12,662,014, issued on June 23, was assigned to ZF Friedrichshafen AG (Friedrichshafen, Germany).

"Monitoring device and method for monitoring a closed state of a battery switch, inverter device, electric axle drive and motor vehicle" was invented by Robert Maier (Neudrossenfeld, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A monitoring device for monitoring an on/off state of a battery switch that has a power source, a diode connected in series to the power source, and an evaluation circuit. The power source and diode are connected in parallel to the battery circuit. The power source is configured to generate a current or voltage between a first ...