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
Plasma processing method and plasma processing apparatus
Device for producing stable and augmented flame
Vest
Method for the support of a rotating workpiece during grinding and a hydrodynamic steady rest
Drum tensioning method and apparatus for load hoist wire rope
Photonic assembly for optical fibers
Portable global navigation satellite system smart antenna
  Randomly Featured Patents
Method for explosion welding of joints and cathode protection of pipes
Sub-pixel structure in transflective color liquid crystal display
Snap-action member
Weld repair of superalloy materials
Light fixture
Proteins and nucleic acids encoding same
Variable intensity brake light
Method for improving motion times of a stage
Alignment of optoelectronic components using a composite adhesive
Subranging analog-to-digital converter with multiplexed input amplifier isolation circuit between subtraction node and LSB encoder