ALEXANDRIA, Va., March 17 -- United States Patent no. 12,580,472, issued on March 17, was assigned to Hyundai AutoEver Corp. (Seoul, South Korea).

"Apparatus and method for controlling bidirectional resonant DC-DC converters" was invented by Woo Won Rhee (Seoul, South Korea) and Dong Hui Lim (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for controlling a bidirectional resonant DC-DC converter includes a bidirectional resonant DC-DC converter that includes a primary-side full-bridge circuit that is coupled to the input side, a secondary-side full-bridge circuit that is coupled to the output side, and a resonant tank that is coupled between the primary-side full-bridge circuit...