In an athletic shoe having a pocket, generally disposed laterally and mounted upon the quarter portion for the shoe, the pocket comprises a liner of material, or a pair of the same, each stitched or otherwise fastened to the side of the shoe, so that the front and back edges of the pocket are confiningly...http://www.google.co.uk/patents/US4697363?utm_source=gb-gplus-sharePatent US4697363 - Athletic shoe pocket
