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
Adaptive take-off strips for smoothing ink consumption
Thin film transistor and flat panel display device including the same
Belt with light
Rear bumper for an automobile
Provision of downlink packet access services to user equipment in spread spectrum communication network
Method of publicly displaying a person's relationship status
  Randomly Featured Patents
Projectile having fins with spiracles
Composition comprising BMP-2 amplifier/co-activator for enhancement of osteogenesis
Method for fabricating liquid crystal display device
Safety running system for vehicle
Digital data processing circuit
Stable, water soluble salt compositions of M-AMSA in 1-methyl-2-pyrrolidinone
Latching device for securing stacked printed circuit boards together
Method of superposing webs
Anthracenedione compounds
Optical communication system having a liquid crystal routing switch