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Machine-readable food packaging film

  • US 10,074,046 B2
  • Filed: 03/16/2017
  • Issued: 09/11/2018
  • Est. Priority Date: 12/23/2014
  • Status: Active Grant
First Claim
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1. An article of food packaging, characterized by a patterned layer of film that is transparent except at one or more visible light bands of wavelengths, said film presenting an attenuation of at least 3 dB across each said band, and each said band being less than 30 nanometers in width, the pattern comprising plural blocks of a sparse digital watermark, tiled across the film, the article of food packaging wrapping one or more items of food.

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