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:
Nov. 07, 2006
Filed:
Apr. 17, 2000
Kieran Gerard Larkin, Putney, AU;
Michael Alexander Oldfield, Eastwood, AU;
Kieran Gerard Larkin, Putney, AU;
Michael Alexander Oldfield, Eastwood, AU;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of utilising a two-dimensional code pattern is disclosed comprising the steps of encoding () the structure of phase perturbations (including singularities) on a continuous phase map structure as an encoded representation of the code information. The codes can then be impressed or printed on other media such labels, documents, envelopes etc. A method of demodulating () the aforementioned codes and determining a phase map structure for the code including the detection of embedded phase singularities and decoding the embedded information, is also disclosed.