A collapsible keyboard assembly having, in one embodiment, a plurality of keys each of the plurality of keys having a top portion and a portion of the plurality of keys displaced adjacent one another to form at least one row. A plurality of keys are coupled to a support element which is capable of being...http://www.google.es/patents/US6331850?utm_source=gb-gplus-sharePatente US6331850 - Collapsible keyboard
