ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,959, issued on June 17, was assigned to KYUNGDONG NAVIEN Co. LTD. (Gyeonggi-do, South Korea).
"Heat exchanger unit" was invented by Jun Kyu Park (Seoul, South Korea) and Duck Sik Park (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A heat exchanger unit according to the present invention includes a sensible heat exchanger including a sensible heat exchange pipe disposed in a sensible heat exchange area for heating water used for heating by receiving sensible heat generated by a combustion reaction, wherein the sensible heat exchange pipe receives the water used for heating and flows same through the interior, and a sensible heat f...