Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Television with a stand
Wireless control kit for camera
Method and system for detecting target objects
Mobile terminal based on W-CDMA system having receive diversity function and system thereof
Writing implement
Soybean EF1A promoter and its use in constitutive expression of transgenic genes in plants
Detection and use of low molecular-weight modulators of the cold-menthol receptor TRPM8
  Randomly Featured Patents
Microphone suitable for professional live performance
Shaver handpiece
Pierce cam
Apparatus for loading envelopes onto sorting machines
Reflector for a light emitting device
Heat-developable photosensitive material with antihalation layer
Process for treating a liquid medium
Method for forming terminal of stacked package element and method for forming stacked package
Ingredient mixing bowl and moisture reduction system for a vending machine
Methods for forming co-planar wafer-scale chip packages