A shoe comprising a shoe upper including a male member and a shoe sole including a female receptor for locking with the male member. The male member locks with the female receptor by moving the male member with respect to the female receptor in a first direction, which locks the shoe upper with the shoe...http://www.google.fr/patents/US7584555?utm_source=gb-gplus-shareBrevet US7584555 - Hidden-type convertible shoe
