ALEXANDRIA, Va., March 17 -- United States Patent no. 12,575,548, issued on March 17, was assigned to AQUA DEVELOPMENT LTD. (Seoul, South Korea).
"Air-lifting venturi apparatus" was invented by Yong Kil Cho (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to an air lifting Venturi apparatus including a first inflow pipe extending in the form of a tube to guide inflow of water; a second inflow pipe extending in the form of a tube to guide inflow of air or oxygen; a Venturi pipe including a through passage having a neck portion having a diameter smaller than a diameter of an inflow port between the inflow port and an outflow port, wherein the first inflow pipe i...