ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,389,840, issued on Aug. 19.
"Fluid dynamic rain-making apparatus" was invented by Shih-Hsiung Chen (Tainan, Taiwan) and Shu-Hsia Chang Chien (Kaohsiung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fluid dynamic rain-making apparatus includes a first tubular member (10) and a thermal conductor (20). The first tubular member (10) includes a fluid channel having a first opening (12) and a second opening (13). An axial cross section of the fluid channel (11) decreases from the first opening (12) toward the second opening (13). The thermal conductor (20) includes a second tubular member (21) attached to the second opening (13) of the first tubula...