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
Thin film transistor array wherein both an auxiliary electrode and a storage electrode are shaped as an octagonal ring
Packet-loss handling for downlink multi-user multiple-input and multiple-output wireless network
Thiophene-containing organic photoelectric materials, their preparation methods and solar cell devices
Interactive design, synthesis and delivery of 3D character motion data through the web
Method for drive-controlling electric machinery
Load balancing multicast traffic
Thermal-assisted magnetic recording head capable of supressing the temperature rise of scatterer
  Randomly Featured Patents
Process for making microcapsules and apparatus therefor
Reading lens system
Vehicle wheel
Method of rust inhibition with thermosetting fluorine-containing resin powder coating composition
Mobile phone
Method of manufacturing a thin film magnetic head
Band compression apparatus for a video signal
Shaken not stirred
Wavelength selective and tunable semiconductor laser device with coupled cavities