The tissue-engineered heart valve of the present invention is comprised of elements, such as leaflets, formed from self-supporting human engineered tissue. Such self-supporting tissue is comprised of living biological cells and extracellular matrix without the presence of nonviable scaffolding structures....http://www.google.ca/patents/US20030027332?utm_source=gb-gplus-sharePatent US20030027332 - Tissue engineered heart valve
