A hand-held portable computer has a mouse button that is surrounded in close proximity by directional buttons. Placing the directional buttons in close proximity around the mouse button makes on-screen navigation easier, since the same single finger need only be moved by a small amount to actuate one...http://www.google.de/patents/US6977811?utm_source=gb-gplus-sharePatent US6977811 - Keyboard with mouse for a hand-held portable computer
