The patent wars over the design of transcatheter aortic valve replacement (TAVR) devices seemed to disappear roughly nine years ago, but there is at least one more episode for Dublin-based Medtronic plc before the company could lay the issue to rest. A jury declared that Medtronic is liable for more than $100 million in damages over alleged infringement of a patent held by Broomfield, Colo.-based Colibri Heart Valve LLC, but the contested patent has expired, and Medtronic said it intends to pursue the matter further.