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:
Apr. 18, 2006
Filed:
Aug. 05, 2003
Wai Cheung, North Point, HK;
Zhi-guo Chang, ShenZhen, CN;
Shillin Ding, ShenZhen, CN;
Ying-feng LV, ShenZhen, CN;
Wai Cheung, North Point, HK;
Zhi-guo Chang, ShenZhen, CN;
Shillin Ding, ShenZhen, CN;
Ying-feng Lv, ShenZhen, CN;
Abstract
Methods and systems for encoding and decoding a 2D symbol is disclosed. According to one aspect of the 2D symbol, the following characteristics are realized: 1) variable symbol widths and height; 2) variable print resolution, 3) multiple damage protection levels; 4) large information storage; 5) high redundancy; 6) readable by line based scanning devices; 7) recognizable by either contact scanning or non-contact scanning devices. In addition, a set of positioning lines are attached 2D symbol for guiding scanning devices to decode the 2D symbol with proper resolution.