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
Flat panel display device and stereoscopic display device
Benzimidazole inhibition of biofilm formation
Vending machine
Wireless device and communication control method
Email certificates
Content display system
Lentiviral gene transfer vectors and their medicinal applications
  Randomly Featured Patents
Continuous thermopile
Magnetoresistance effect element and magnetic memory
Imidazole leuco dye composition containing 4'-hydroxyacetanilide, diagnostic kit and method using same
Curable resinous composition comprising an unsaturated cycloacetal compound and a polythiol compound
Adjustable exercise handgrip assembly
Process for preparing a pyrophosphate-silicate detergent product
Wideband power efficient high transmission power radio frequency (RF) transmitter
Depolymerization process
Method of screening for cDNA encoding novel secreted mammalian proteins in yeast
Rapid glycopeptide optimization via neoglycosylation