This disclosure provides a system for editing graphical data based upon relative time of entry, and in particular, provides editing software used with an electronic digitizing clipboard. A stylus of the clipboard is used to write on pages, with a digitizer underneath the pages generating an electronic...http://www.google.com.au/patents/US6151611?utm_source=gb-gplus-sharePatent US6151611 - System for editing graphical data based upon relative time of entry
