A steerable toy comprising a rigid, elongated footboard defined by an upper surface and front and rear terminal ends and horizontally supported slightly above ground level by a pair of spaced-apart small diameter wheels flexibly journaled thereunder inboard from the rear terminal end to support a rider...http://www.google.fr/patents/US6250656?utm_source=gb-gplus-shareBrevet US6250656 - Skateboard-bicycle combination
