ALEXANDRIA, Va., June 19 -- United States Patent no. 12,329,647, issued on June 17, was assigned to Lento Medical Inc. (Houston).

"Prosthetic femoral head and method of making the same" was invented by Ilwhan Park (Katy, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A femoral head prosthesis is a multilayer composite having a metal neck stem component thread or press fit into a hollow rigid shell of metal or ceramic, a polymeric core filling the interior volume under the hollow rigid shell and around a forward part of the neck stem, and a smooth, void-free polymeric articulation layer of at most 12 mm over the exterior of the shell. The prosthesis is formed by a polymeric molding process wherein polym...