A method and system that converts ballistic movement of a pen (e.g., movement of a pen point across a surface) into thickness information for digital ink data. The pen includes at least one accelerometer that is used to generate the ballistic information. A thickness conversion component may be located...http://www.google.se/patents/US7176906?utm_source=gb-gplus-sharePatent US7176906 - Method of generating digital ink thickness information
