Clock sandal with a flexible sole plate, a pair of flexible foot retaining straps, a time keeping device and a time keeping device retaining loop. The sole plate includes a thin flexible top layer of material. The sole heal portion includes a hollow cavity which is covered by a hinged top plate. The...http://www.google.fr/patents/US7726046?utm_source=gb-gplus-shareBrevet US7726046 - Clock sandal
