ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,234,814, issued on Feb. 25, was assigned to Tunghai University (Taichung, Taiwan).

"Guidance unit (MK-1) and arcwing circulating power guidance system with the guidance unit (MK-1)" was invented by Kuo-wei Chiu (Taichung, Taiwan) and Chia-An Yeh (Zhubei, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A guidance unit comprises a first pipe part and a second pipe part, an inner space diameter of the second pipe part is smaller than an inner space diameter of the first pipe part, causing a cross-sectional area of a second flow space perpendicular to a pipe axis of the second pipe part smaller than that of a first flow space perpendicular to a pipe a...