An athletic shoe having an upper portion (15) fixed to a lower portion (16) comprising a midsole (21) and an attached wear surface (22). To provide both cushioning and stability to the foot the midsole includes slots or channels (25, 27) extending at an angle other than normal to the wear surface so...http://www.google.co.uk/patents/US4638577?utm_source=gb-gplus-sharePatent US4638577 - Shoe with angular slotted midsole
