ALEXANDRIA, Va., Dec. 9 -- Abiomed, Danvers, Massachusetts, has been assigned a patent (9,833,314) developed by Scott C. Corbett, Beverly, Massachusetts, for the percutaneous valve deployment. The abstract states: "A polymeric heart valve is disclosed including: a valve body having a central axis having a body fluid pathway extending along the central axis from an inflow end to an outflow end; a flexible stent disposed about an outer circumference of the body and including at least three flexibl . . .