A portable computer having a keyboard and one or more support members that are pivotable from a retracted position to an extended position to raise the front end of the computer. In the extended position, the support member raises the front end of the housing, and therefore tilts the keyboard...http://www.google.sh/patents/US5818688?utm_source=gb-gplus-sharePatent US5818688 - Tiltable negative slope portable computer having slotted support members
