A pointing device according to the present invention includes a trackball embedded in the case of a computer display. The trackball is placed adjacent to the display and the select buttons for the trackball are located on the backside of the display case behind the trackball. The user guides the trackball...http://www.google.com/patents/US5208736?utm_source=gb-gplus-sharePatent US5208736 - Portable computer with trackball mounted in display section
