Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Security device based on customized microprism film










Image Number 10 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
Method for eliciting an immune response to human telomerase reverse transcriptase
Encryption using alternate authentication key
Self-service administration of a database
Adaptive block pre-fetching method and system
Polycarbonate resin composition and formed product thereof
Obviation of recovery of data store consistency for application I/O errors
Rose plant named `ESM R057`
  Randomly Featured Patents
Position sensor of linearly moving bodies
Boot hanger
Orthodontic anchor
Recording medium and method for reproducing information therefrom
Method for producing a centrifugally cast concrete product
Process for buried diode formation in CMOS
System and method for practicing spectrophotometry using light emitting nanostructure devices
Mapping sensor system for detecting positions of flat objects
Compounds useful for treating allergic and inflammatory diseases
Thrust bearing assembly