A method of retrieving a content using a print medium is disclosed. The method starts by determining a print media identifier from the print medium using a sensor module of a mobile telecommunications device. The print media identifier is linked to the content. The method then retrieves, using the mobile...http://www.google.com.tw/patents/US7860531?utm_source=gb-gplus-share專利 US7860531 - Retrieving content via a coded surface
