ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,305, issued on June 23, was assigned to Hyundai Motor Co.; (Seoul, South Korea) and Kia Corp. (Seoul, South Korea).

"Apparatus and method for measuring amount of hydrogen stored in storage container" was invented by Jin Young Heo (Hwaseong-Si, South Korea) and Hai Jun Jeong (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are an apparatus and a method for measuring an amount of hydrogen stored in a storage container. The apparatus includes the storage container, in which the hydrogen is stored, a plurality of temperature sensors surrounding a surface of the storage container, and that measure surface temperatures for locat...