An ergonomic pointing device is disclosed and described. Specific criteria, for example height, length, curvature, and relative positions of device elements, such as keys and a high point, define a configuration of a preferred embodiment of the present invention. These criteria work together to provide...http://www.google.co.uk/patents/US5414445?utm_source=gb-gplus-sharePatent US5414445 - Ergonomic pointing device
