An adjustable support assembly for a digitizer device, such as a track ball or mouse, mounts between a computer keyboard support tray and an articulating arm normally attached to the tray for supporting and adjusting the tray. The support assembly includes a right-hand support pad and a left-hand support...http://www.google.ca/patents/US6079676?utm_source=gb-gplus-sharePatent US6079676 - Adjustable mouse pad support
