The present invention allows a user to draw a closed periphery around an amount of information on the display of a pen-based computer system. The periphery information is transmitted to the computer system by a digitizing tablet. When received by the computer system, the computer system divides the area...http://www.google.fr/patents/US6730862?utm_source=gb-gplus-shareBrevet US6730862 - Erase feature in pen-based computing
