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:
Jan. 29, 2013
Filed:
Apr. 04, 2011
David J. Naddor, Johns Creek, GA (US);
David J. Naddor, Johns Creek, GA (US);
Other;
Abstract
A bi-directional two-dimensional (2D) matrix barcode symbology for use with bar code, cell phones and other optical readers. A finder structure includes indicia for locating data blocks containing bytes of information encoded through bi-directional and orthogonal lines containing individual bits of information. Individual blocks contain error correction information, and are formed into 2×2 superblocks used to build larger codes. Intrinsic prefix information provides a redundant geometric identification for individual blocks within the overall structure, providing a built-in mapping of the overall structure, even when portions are missing or undecodable. The overall symbol has a second set of error correction parameters for further redundancy. The symbology is a versatile symbology in that the number of check data blocks is user selectable to provide the desired level of error correction.