The present invention relates to a device intended for locating the tip of a pen on a writing board, the pen and the board being part of a writing digitizing system further comprising at least two magnetic dipoles, each being coupled with a current source so as to create distinct magnetic fields which...http://www.google.fr/patents/US7064750?utm_source=gb-gplus-shareBrevet US7064750 - Device and system for locating the position of the tip of a pen on a digitising board
Device and system for locating the position of the tip of a pen on a ...
