Resources Contact Us Home
Secure product authentication tags

Image Number 4 for United States Patent #7744130.

A tag with features to enable its authenticity to be determined includes a hidden code intermixed with a visible pattern such that the hidden code is not readily detectable under ambient light condition, without the use of a specially designed reader. In one embodiment the tag is formed with a first layer containing a hidden code, formed of reflective elements, which overlies a second layer which is designed to absorb light having a predetermined wavelength (e.g., IR light). The hidden code can be detected by projecting a light source having the predetermined wavelength (e.g., an IR source) at a predetermined angle on the tag and using a sensor to sense the reflection from the tag.

  Recently Added Patents
Method for driving electrophoretic display device, electrophoretic display device, and electronic device
Compression molding method and reinforced thermoplastic parts molded thereby
Wireless updating of hearing devices
Fuel cell support structure
Adaptive input interface
Stand for food service
Adding value to a rendered document
  Randomly Featured Patents
Catalyst comprising tellurium chemically bound to aromatic polymer
Electroplating apparatus for coating a dielectric resonator
Internal combustion engine
Custom shutter
Testing media content for wireless communication devices
Phosphor powder
Valve timing controller
6-O-acyl ketolide antibacterials
Safety outlet cover assembly
Isoindolinone kinase inhibitors