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
Using interrupted through-silicon-vias in integrated circuits adapted for stacking
Estimating travel time
Macrocyclic cysteine protease inhibitors and compositions thereof
Testing SQL query writing skills
5-phenyl-pentanoic acid derivatives as matrix metalloproteinase inhibitors for the treatment of asthma and other diseases
Sink
Switched capacitor amplifier
  Randomly Featured Patents
Spider bearing support for a meter rotor
Use of quaternary ether amines as fiber processing agents
Process for recovery of plant sterols from by-product of vegetable oil refining
Heater with alert indicator
Horizontal assembly of stator core using a central rail structure
Time domain monitoring of myocardial electrical stability
Thermal transpiration pump
Manufacture of light weight pistons
Roll for extracting oil from shaved flavedo
Method of correcting variations in radial force between a tire and the ground