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
Method of treating lung cancer
Nano-pigment inkjet ink composition that has a low odor and is environmentally-friendly
Detecting patterns of abuse in a virtual environment
Pixel interleaving configurations for use in high definition electronic sign displays
Base station, relay station, and bandwidth allocation method
Flash drive
Projection-type video-image display apparatus
  Randomly Featured Patents
Power charging assembly and method that includes a low voltage electrical device operable with pulse width modulation (PWM) control
Methylmethacrylate/acrylic acid copolymer antinoise sheets
Filter assembly comprising a plastic resonator support and resonator tuning assembly
Axial anti-rotation coupling
Exposure apparatus for optical disc
Hole punch
Flower pot cover
Bobbin winding control
Pregnancy tester
Fail-safe circuit mechanism for generating a pulse indicating the precise moment of firing of a gas exhausting gun