ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,478,470, issued on Nov. 25, was assigned to JC Medical Inc. (Burlingame, Calif.).

"Valve-in-valve delivery of a heart valve prosthesis" was invented by Ji Zhang (Burnaby, Canada), Brandon G. Walsh (Kaysville, Utah), Cheng Yong Yang (Foster City, Calif.), Jinhua Zhu (San Francisco) and Dennis McMahon (Windsor, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A replacement heart valve prosthesis can be delivered to or within an existing prosthesis through a valve-in-valve delivery procedure. The existing prosthesis can be a prosthetic heart valve or other device that is implanted at a target site, such as an aortic or mitral valve of the heart. The m...