Patent Number: 7,131,596

Title: Symmetric data tags

Abstract: Coded data for disposal on or in an interface surface associated with a product item, the coded data being indicative of an identity of the product item, the coded data being arranged in accordance with at least one layout having n-fold rotational symmetry about a center of rotation, where n is at least two, the layout including n identical sub-layouts rotated 1/n revolutions apart about the center of rotation, at least one sub-layout including rotation-indicating data that distinguishes that sub-layout from each other sub-layout.

Inventors: Lapstun; Paul (Balmain, AU), Silverbrook; Kia (Balmain, AU)

Assignee: Silverbrook Research Pty Ltd

International Classification: G06K 19/06 (20060101)

Expiration Date: 2019-11-07 0:00:00