A walking sole for sports shoes, particularly golf shoes, having, on at least one of its lateral edges, a series of substantially transverse grooves, filled with a material having a degree of elasticity superior to that of the material making up the sole. The grooves are provided in the front portion...http://www.google.co.uk/patents/US4837949?utm_source=gb-gplus-sharePatent US4837949 - Shoe sole
