Resources Contact Us Home
Security device based on customized microprism film

Image Number 15 for United States Patent #7903308.

A security device comprises at least two regions, each region comprising a prismatic surface structure defining an array of substantially planar facets. Each region forms a reflector due to total internal reflection when viewed at least one first viewing angle and is transparent when viewed at at least one second viewing angle. The said at least one first viewing angle of one region is different from the at least one first viewing angle of the other region.

  Recently Added Patents
Performance apparatus and electronic musical instrument
Meter socket cabinet
Method and apparatus for displaying system status with a wide range of viewing angle
Image sensor with improved color crosstalk
Braided boomerang pet toy
Highly stable electrolytic water with reduced NMR half line width
Hand mixer
  Randomly Featured Patents
Encoding apparatus for hierarchically encoding image signal and decoding apparatus for decoding the image signal hierarchically encoded by the encoding apparatus
Table ornament
Unit for sorting and packaging products capable of being hung on a hooking member for the purpose of their conveyance, such as bunches of fruits, in particular table grapes or truss tomatoes
Electric motor and electric power steering apparatus equipped with the motor
Image processing apparatus, image processing method, and computer readable medium
Carbocyclic adenosine analogs useful as immunosuppressants
Elevator control system
Ricin-like toxin variants for treatment of cancer, viral or parasitic infections
Optical waveguide circuit and method of fabricating same
Hair groomer thinning guide