A shoe including an insertable midsole orthotic located within a structure formed by a combination of a bottom sole and a portion of a shoe upper attached to the bottom sole. Both the inner and outer surfaces of the sole include rounded portions which together define a rounded portion of the shoe sole...http://www.google.co.uk/patents/US7793429?utm_source=gb-gplus-sharePatent US7793429 - Shoe sole orthotic structures and computer controlled compartments
Shoe sole orthotic structures and computer controlled compartments
