Dynamically Controlled Ankle-Foot Orthosis (DCO) with Regenerative Kinetics: Incrementally Attaining User Portability. - Joseph Hitt; A. Mehmet Oymagil; Thomas Sugar; Kevin W. Hollander; Alexander W. Boehler; Jennifer Fleeger (ICRA, 2007)

Robotic transtibial prosthesis with biomechanical energy regeneration. - Joseph Hitt; Thomas Sugar; Matthew A. Holgate; Ryan Bellman; Kevin W. Hollander (Ind. Robot, 2009)