The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2012
Filed:
Nov. 04, 2010
Roger David Butler, Rozelle New South Wales, AU;
Alan Gordon Doubleday, Macquarie Park New South Wales, AU;
Matthew Christian Duggan, Tokyo-to, JP;
Roger David Butler, Rozelle New South Wales, AU;
Alan Gordon Doubleday, Macquarie Park New South Wales, AU;
Matthew Christian Duggan, Tokyo-to, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of authenticating a first document () including content () and a barcode (). The barcode () comprising barcode elements each having a predetermined form. A plurality of the barcode elements of the barcode are detected in a representation of the first document (). A visual difference between each of the detected barcode elements and the predetermined form of the barcode element is determined. The barcode () is decoded to determine a second document. The first document () and the second document are compared based on the determined visual difference, in order to authenticate the first document ().