ALEXANDRIA, Va., June 17 -- United States Patent no. 12,315,971, issued on May 27, was assigned to HYUNDAI MOTOR COMPANY (Seoul, South Korea) and KIA Corp. (Seoul, South Korea).

"Multi-fuel cell system and control method thereof" was invented by Jun Young Kim (Gumi-si, South Korea), Jun Young Park (Suwon-si, South Korea), Kyu Il Lee (Yongin-si, South Korea) and Min Su Kang (Paju-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a multi-fuel cell system and control method thereof in which when a plurality of fuel cell units electrically connected to each other, each including a fuel cell, an air compressor, and a humidifier, is cold-started, a first fuel cell unit, one of the plurali...