ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,544,703, issued on Feb. 10, was assigned to NIPPON MUKI Co. LTD. (Tokyo).
"Air filter" was invented by Kazuya Seki (Tochigi, Japan), Shiro Hayashi (Ibaraki, Japan) and Takeki Yamaguchi (Tochigi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An air filter includes: a pleated filter material folded into a zig-zag form at folding lines along a first direction to have peak parts and valley parts arising alternately in a second direction perpendicular to the first direction, trapping fine particles in a gaseous matter flowing in a gas flow direction perpendicular to the first direction and the second direction; a filter frame being a rectangular filte...