A digitizing tablet for use in conjunction with a stylus and a digitizing circuit capable of generating signals representative of the position of the stylus on the digitizing tablet is disclosed. The digitizing tablet includes a sheet of glass that functions as the writing surface over which the stylus...http://www.google.de/patents/US4859813?utm_source=gb-gplus-sharePatent US4859813 - Digitizer tablet having electrical interconnect components on the writing substrate
