DIGITAL PAPER-ENABLED SPREADSHEET SYSTEMS Application EP-2171611-A4 European Patent Office 26 Nov 2014
Method of providing information via context searching of a printed graphic image Grant US-8511565-B2 United States of America 20 Aug 2013
ELECTRONIC PEN AND METHOD FOR RECORDING OF HANDWRITTEN INFORMATION Grant EP-1454225-B1 European Patent Office 09 Jan 2013
Maze pattern analysis for using a digital pen Application EP-1632901-A3 European Patent Office 04 Jan 2012