Patent 7972377 was granted and assigned to Medtronic (company) on July, 2011 by the United States Patent and Trademark Office.
A trileaflet biological prosthetic heart valve (11, 41) comprising a thin, rigid annular outer frame (25, 43) which supports three elastic, laminated spring inner frames (18, 57) which in turn provide consistent geometric form and structure for attachment of tissue leaflets (15, 71).