ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,429,042, issued on Sept. 30, was assigned to Semes Co. Ltd. (Chungcheongnam-do, South Korea).
"Torsion pump and chemical liquid supply unit" was invented by Young Jun Son (Cheonan-si, South Korea), Byoung Doo Choi (Cheonan-si, South Korea), Young Un Yun (Anyang-si, South Korea), Woo Ram Lee (Seoul, South Korea), Sung Chul Jung (Cheonan-si, South Korea), Woo Sin Jung (Cheonan-si, South Korea) and Ki Sang Eum (Cheonan-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pump for supplying a liquid is provided. The pump including a flexible tube body including a pump chamber; a first flange provided at one end of the tube body; and a second fl...