ALEXANDRIA, Va., June 4 -- United States Patent no. 12,318,284, issued on June 3, was assigned to United States Government as Represented By The Department of Veterans Affairs (Washington) and The Regents Of The University of California (Oakland, Calif.).

"Endovascular prosthetic heart valve replacement" was invented by Elaine Evelina Tseng (San Francisco) and Ali Nejatbakhsh Azadani (San Francisco).

According to the abstract* released by the U.S. Patent & Trademark Office: "A prosthetic aortic valve intended for native or valve-in-valve within bioprostheses includes an expandable support scaffold and valve leaflets disposed within an upper leaflet portion of the support scaffold. The valve leaflets within the upper portion may be located...