A method of sending a message using a print medium is disclosed. Coded data on a surface of the business card is sensed by a sensor module in a media feed path of a communications device. The coded data encodes an identifier which uniquely identifies the surface. The identifier is determined from sensed...http://www.google.ca/patents/US8081994?utm_source=gb-gplus-sharePatent US8081994 - Messaging using a coded surface
