In a method and apparatus for detecting the position of a coordinate probe relative to a digitizing tablet, a sensing coil grid provided on a working region of the tablet includes a plurality of sensing coils, each of which is U-shaped and has a front section and a grounded rear section. The coils are...http://www.google.fr/patents/US6288710?utm_source=gb-gplus-shareBrevet US6288710 - Method and apparatus for detecting the position of a coordinate probe relative to a digitizing tablet
Method and apparatus for detecting the position of a coordinate probe ...