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
Liquid crystal display
Optical splitter device
Maize hybrid X08B748
Barrier layers comprising Ni-inclusive ternary alloys, coated articles including barrier layers, and methods of making the same
Mobile electronic device
Attribute information providing system
Low-coupling oxide media (LCOM)
  Randomly Featured Patents
Detection of customizations of application elements
Method of manufacturing surface-emitting backlight, by molding contact member integrally with molded case
Antibacterial agents
Glass fiberization by centrifugal feed of glass into attenuating blast
Automatically aligned tow bar hitch
Personal respiratory protection system
Carbon nanotube oscillator surface profiling device and method of use
Primitive operator for similarity joins in data cleaning
Hydraulic fine blanking head for a press and method of its infeed
Sealable toiletry article