 IRVINE, CA ACCESSWIRE April 7, 2021 Hancock Jaffe Laboratories, Inc. NASDAQ:HJLI, a developer of medical devices that restore cardiac and vascular health, today announced that the United States Patent and Trademark Office USPTO has issued the first patent covering the companys VenoValve. The patent is entitled Implantable Vein Frame and is U.S. patent number 10,959,841. 