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
Phase-amplitude 3-D stereo encoder and decoder
Systems and methods for determining muscle force through dynamic gain optimization of a muscle PID controller for designing a replacement prosthetic joint
Method for processing an algae medium containing algae microorganisms to produce algal oil and by-products
Toy ball
Modulators of cystic fibrosis transmembrane conductance regulator
Semiconductor device
Wireless network device including a polarization and spatial diversity antenna system
  Randomly Featured Patents
Penile implant
Systems and methods for fluid handling
Sofa
BICMOS cache TAG having small signal exclusive OR for TAG comparison
Front headlight for an automobile
Illumination apparatus
Thermal electric air cooling apparatus and method
PC circuits, systems and methods
Modified alkyd compositions comprising polyol latex compositions and processes of making them
Tissue sealant for use in non compressible hemorrhage