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
Satellite mounting pole
Tunnel magnetoresistance read head with narrow shield-to-shield spacing
Systems and methods for detailed error reporting in data storage systems
Charged particle source with integrated electrostatic energy filter
Compositions of quaternary ammonium compounds containing bioavailability enhancers
Visual processing apparatus and visual processing method
Synchronous rectifier network unit circuit and method
  Randomly Featured Patents
Optimistic distributed simulation based on transitive dependency tracking
Nuclear fuel assembly
Removal of contaminants from a fluid
Sprinkler
Method of bonding metal to a non-metal substrate
Method and apparatus for automatic detection and healing of signal pair crossover on a high performance serial bus
Medical assist device with lift seat
Ignition plug for an internal combustion engine
Bipedal robot with storage battery
Rigid boat cover