Patent ID: 7742755
Filing Date: 2010-06-22
Classification: G06Q

Abstract:
1. A method of retrieving a bill using a print medium, comprising the steps of: providing a print medium having first coded data in a first format and second coded data in a second format, the first coded data encoding first information and the second coded data encoding second information, at least some of the first information being indicative of the print media identifier, the first format being a linear data track extending along a side of the print medium, at least some of the second information being indicative of the print media identifier and of a two-dimensional coordinate grid, the second format being a two-dimensional pattern; printing bill information onto the print medium using a printer module of a mobile telecommunications device; reading the data track during said printing using an optical encoder of the printer module, said optical encoder being configured for automatically reading said data track during said printing; decoding the read data track to determine the print media identifier; communicating the print media identifier to a computer system, thereby causing the computer system to associate the print media identifier with the printed bill information to create a linked bill; sensing the second coded data encoded on the print medium using a sensor module of the mobile telecommunications device; decoding the sensed second coded data to determine the print media identifier and a two-dimensional coordinate position; and, retrieving, using the mobile telecommunications device the decoded second coded data, at least one of: the linked bill and information regarding the bill, wherein the second coded data further encodes a digital signature associated with the print media identifier, the method including determining from the sensed coded data the digital signature and retrieving, if the digital signature is authentic, the bill, and the digital signature includes at least one of: a random number; a secret-key digital signature; and a public-key digital signature.