ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,544,695, issued on Feb. 10, was assigned to NATIONAL INSTITUTE OF ECOLOGY (Seocheon-gun, South Korea).
"Double filter structure" was invented by Won Jun Lee (Gwangju, South Korea), Ji Yeong Kim (Gunsan-si, South Korea), Ki Dong Kim (Guri-si, South Korea), Hae Jin Bae (Gunsan-si, South Korea) and Saeromi Mun (Gunsan-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "According to various exemplary embodiments of the present disclosure, a double filter structure is applied to control a movement path of the fluid to be purified to efficiently utilize the filter unit and use different types of filter unit to increase the purification efficiency."...