Based on handwriting coordinate data input by a pen at an arbitrary position on a screen, a handwriting display portion displays a handwriting at the writing position. A recognition portion recognizes a written character or an editing symbol. A handwriting erase portion erases the handwriting, and returns...http://www.google.de/patents/US6088481?utm_source=gb-gplus-sharePatent US6088481 - Handwritten character input device allowing input of handwritten characters to arbitrary application program
