Ashton Stark stands next to his 1972 Volkswagen Beetle, which he converted into an electric car. Courtesy Noel Stark hide caption

itoggle caption Courtesy Noel Stark

Staff members at the Army Experience Center in Philadelphia demonstrate the Humvee interactive simulator in 2009. Matt Rourke/AP hide caption

itoggle caption Matt Rourke/AP

Smart bandages, including this one from Corventis, can transmit cardiac data in real time from a patient's body to a doctor. Courtesy of Mark Dastrup hide caption

itoggle caption Courtesy of Mark Dastrup