ALEXANDRIA, Va., April 7 -- United States Patent no. 12,594,518, issued on April 7, was assigned to KHANFILTER INC. (Daejeon, South Korea).
"Air purification apparatus" was invented by Dae Gon Han (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "According to an embodiment of the present application, there may be provided an air purification apparatus for purifying polluted air and discharging the purified air, which comprises a main pipe including a first flow path, a second flow path, a first filter, a first main area, and a second main area. The air purification apparatus can operate in a filtering mode in which at least some contaminants contained in the air flowing into the main pipe ...