ALEXANDRIA, Va., July 14 -- United States Patent no. 12,683,174, issued on July 14, was assigned to Hyundai Motor Co. (Seoul, South Korea) and Kia Corp. (Seoul, South Korea).

"System and method for estimating hydrogen concentration of fuel cell" was invented by Jun Young Park (Suwon-si, South Korea), Hee Mang Lee (Goyang-si, South Korea), Jae Won Jung (Suwon-si, South Korea) and Seong Cheol Jeong (Suwon-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system and a method for estimating a hydrogen concentration of a fuel cell include the fuel cell, a discharge line connected to an outlet side of a fuel cell hydrogen electrode while connecting the fuel cell to an exterior of the fuel cell, for ...