Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Semiconductor device manufacture in which minimum wiring pitch of connecting portion wiring layer is less than minimum wiring pitch of any other wiring layer
Patterned MR device with controlled shape anisotropy
Light modulators and optical apparatuses including the same
Toothbrush holder
Horizontal card holder
Strap-hook ring
Method and system for tracking mobile electronic devices while conserving cellular network resources
  Randomly Featured Patents
System and method for measuring reflectance of object
Polymeric halocarbons as plasma etch barriers
Fiber lubricants based upon fatty esters of heteric polyoxyalkylated alcohols
Plasma display apparatus and driving method thereof
Optoelectronic sensor
Method and apparatus for automatic load-balancing on a multi-segment network
Vertebral disc repair
Dividable transport pallet and package
Method and apparatus for coating a core material with metal
Powering computer systems