ALEXANDRIA, Va., May 5 -- United States Patent no. 12,620,612, issued on May 5, was assigned to Hyundai Motor Co. (Seoul, South Korea) and Kia Corp. (Seoul, South Korea).

"Fuel cell stack" was invented by Kyu Hwan Shim (Yongin, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a fuel cell stack including a reaction unit comprising a plurality of unit cells and configured to define reaction regions for electrochemical reactions of reactant gases, and manifold blocks disposed at two opposite ends of the reaction unit and provided independently of the reaction unit, the manifold blocks having manifold flow paths for supplying and discharging the reactant gases, thereby...