Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
State detection device, electronic apparatus, measurement system and program
Semiconductor memory device
Method and apparatus for supporting management actions for very high throughput in wireless communications
Bid optimization in search engine marketing
Vehicles with electric motor
Image pickup device with a plurality of pixels and an AD conversion circuit
Method and structure for forming ETSOI capacitors, diodes, resistors and back gate contacts
  Randomly Featured Patents
Superconductive electric cable
Process for producing adamantane compound
Quinolone- and naphthyridonecarboxylic acid derivatives
Waterproof connector and method of manufacturing the same
Safety light
Encoded dropout compensator system
Tamping head with limiting stop for tool reciprocation
Apparatus and method for pulling cable
Optical ribbon fiber including strength members
Custom dental shade guide tab