Resources Contact Us Home
Security device based on customized microprism film

Image Number 12 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
Simultaneous wafer bonding and interconnect joining
Method and device for peer arrangement in single substream upload P2P overlay networks
Portable reading device with mode processing
Accordion bioreactor
Methods, systems, and computer program product for virtually modifying surface region curvature to detect protrusions
Sperm factor sequences
Battery power management system and method
  Randomly Featured Patents
Magnetic resonance imaging method and compounds for use in the method
Rotating electric motor with reduced cogging torque
Cable clip
Vacuum and bag system
Computer system
Amino acid derivatives useful to treat stroke
Method for producing carbonyl compounds
Automatically cancelling turn signal apparatus
Method and apparatus for producing optical fiber ribbons
Transmitter and receiver circuits for high-speed parallel digital data transmission link