An article of footwear includes an outsole connected to an upper having a toe portion, a heel portion, a foot insertion opening and a tongue which defines two, opposed sides of the upper extending between the heel and toe portions. One end of each of a number of straps is fixed to one side of the upper,...http://www.google.es/patents/US20050126041?utm_source=gb-gplus-sharePatente US20050126041 - EDUCATIONAL SHOE
Número de solicitud: 10/732,081 Número de publicación: US 2005/0126041 A1 Fecha de presentación: 10 Dic 2003 Patente emitida: US6968638 ( Fecha de emisión 29 Nov 2005)
