A collapsible keyboard, comprising a center keyboard unit, a left keyboard unit, a right keyboard unit, and a base. Between the left and right keyboard units and the center keyboard unit are connecting members to join them together as one unit. The left and right keyboard units joined to the sides of...http://www.google.fr/patents/US20030030623?utm_source=gb-gplus-shareBrevet US20030030623 - Collapsible keyboard
