Orientation-indicating cyclic position codes

Details Orientation-indicating cyclic position codes Orientation-indicating cyclic position codes

2007-09-04

2007-09-04

Nguyen, Kimberly D. (Department: 2876)

Registers

Records

Particular code pattern

C235S462040, C235S462380

Reexamination Certificate

active

10531734

ABSTRACT:
Machine-readable coded data disposed on or in a substrate in accordance with a layout, the layout having at least order n rotational symmetry, where n is at least two, the layout encoding an orientation codeword comprising a sequence of an integer multiple m of of n symbols, where m is one or more, each encoded symbol being distributed at n locations about a center of rotational symmetry of the layout such that decoding the symbols at each of the n orientations of the layout produces n representations of the orientation codeword, each representation comprising a different cyclic shift of the orientation codeword and being indicative of the degree of rotation of the layout, and wherein the orientation codeword is fault tolerant.

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patent: 5635697 (1997-06-01), Shellhammer et al.
patent: 6141441 (2000-10-01), Cass et al.
patent: 6674427 (2004-01-01), Pettersson et al.
patent: 0844586 (1998-03-01), None

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