A collapsible highchair with a locking device includes a first frame, a second frame which is pivotally connected to the first frame in “X” shape, a seat portion pivotally connected to upper sections of the frames, a backrest connected to the upper section of the first frame, a locking device secured...http://www.google.sh/patents/US20070290528?utm_source=gb-gplus-sharePatent US20070290528 - Collapsible highchair with locking device
