ALEXANDRIA, Va., June 10 -- United States Patent no. 12,292,239, issued on May 6, was assigned to ContiTech Fluid Korea Ltd. (Jeonju-si, South Korea).
"Double tube for heat-exchange" was invented by Kilnam Lee (Nonsan-si, South Korea), Steffen Hendrik (Cheonan-si, South Korea), Jonghoon Cha (Cheonan-si, South Korea), Jinwon Ko (Cheongju-si, South Korea), Ji Yeon Lee (Cheongju-si, South Korea), Hyunjin Im (Cheonan-si, South Korea) and Sunphil Ga (Cheongju-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is a double tube for heat exchange. The double tube for heat exchange includes: a spiral pipe having ridges and valleys alternately formed on a circumferential surface thereof al...