A hand held control device formed as a rigid body adapted to be gripped and carried by a single hand of a user and comprising a plurality of control elements operable by the thumb or a finger of the user's hand gripping and carrying the body, a pointing stick and a chirality detector for sensing whether...http://www.google.com/patents/US5512892?utm_source=gb-gplus-sharePatent US5512892 - Hand held control device
