Embedding and reading imperceptible codes on objects

Encoded color halftone micro-dots for high density digital infor

Encoded label having redundant and scrambled indicia for identif

Encoded random arrays and matrices

Encoding method and related system and product

Encoding small amounts of embedded digital data at arbitrary...

Error correction in macro bar code symbols

Exclusive or cross-coupled framing codes for self-clocking...

Explicit synchronization for self-clocking glyph codes

Filing system scanner and bar code with identification marker ba

Finder pattern for optically encoded machine readable symbols

Foreground/background document processing with dataglyphs

Form and procedure for selecting a code to be kept secret

Formation method of two-dimensional code

Framing codes for robust synchronization and addressing of self-

Generating landscape and portrait oriented tags

Generating tags using tag format structure

Global addressability for self-clocking glyph codes

Glyph pattern generation and glyph pattern decoding

Graphical indicator