A shoe for walking and skating having a shoe, a locating plate, two locating members, two rollers and a brake. The shoe has a sole provided with front and rear holding grooves. The bottom of the locating plate includes front and rear locating frames respectively corresponding to the front and rear holding...http://www.google.fr/patents/US6450508?utm_source=gb-gplus-shareBrevet US6450508 - Shoe for skating and walking
