ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,215,877, issued on Feb. 4, was assigned to DAIKIN INDUSTRIES LTD. (Osaka, Japan).
"Air circulation device" was invented by Masafumi Uda (Osaka, Japan), Yousuke Imai (Osaka, Japan), Keita Kawahara (Osaka, Japan) and Kiichirou Satou (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An air circulation device includes a suction section configured to suck indoor air, and a blower section configured to blow the air sucked by the suction section into a room. The air is in a form of a vortex ring. The air circulation device is operable in at least a first mode in which the vortex ring blown therefrom reaches a wall surface of the room."
The patent wa...