We have designed and experimentally investigated several devices, which can continuously generate sufficient energy from vibrations inside the chest area to power cardiac pacemakers for example. The inventions have received significant attention from news media (please see the CV) as well as several publications. We are collaborating with the medical school the University of Michigan as well as University at Buffalo for these projects. We have conducted animal tests on pigs and sheep during which the chest area vibrations were measured through open chest surgeries. We have also implanted the developed energy harvesters in the animal and have verified its performance.