A shoe of use on a post-operative or otherwise traumatized foot includes a sole assembly having a outer sole, a shock absorbing midsole and an inner sole conforming generally to the contour of the sole of the foot, the sole assembly having a limited degree of flexibility, and an upper assembly including...http://www.google.es/patents/US4677767?utm_source=gb-gplus-sharePatente US4677767 - Shock absorbing surgical shoe
