An adjustable child seat includes a seat body having a seat back and a seat portion. The seat portion has a first base and a second base movably mounted to the first base. The child seat further includes a seat adjusting mechanism for adjusting the length of the seat to customize to differently sized...http://www.google.com.tw/patents/US6705675?utm_source=gb-gplus-share專利 US6705675 - Adjustable child seat for toddlers to small children
