An architecture is disclosed for improved tilt detection for a radiative pickup stylus. The architecture includes a contact sensing mechanism and a coaxial conductor assembly which provides both position measurement and tilt sensing measurement features. By using the contact sensor to establish a calibration...http://www.google.com/patents/US5414227?utm_source=gb-gplus-sharePatent US5414227 - Stylus tilt detection apparatus for communication with a remote digitizing display
