ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,458,492, issued on Nov. 4, was assigned to BEIJING BALANCE MEDICAL TECHNOLOGY Co. LTD. (Beijing).

"Presettable artificial biological aortic valve" was invented by Lei Jin (Beijing), Chengxiong Gu (Beijing), Jiangang Wang (Beijing), Zhihao Fan (Beijing), Tiegang Liu (Beijing) and Jia Wu (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention discloses a presettable artificial biological aortic valve which comprises a valve seat (1), a valve leaflet stent (2) and three valve leaflets (3), wherein the valve seat (1) is a one-way limiting expandable annular metal seat; the head end of each seat body unit (4) is sequentially provided wit...