Resources Contact Us Home
Security device based on customized microprism film

Image Number 10 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
Controller for video game console
Method and apparatus for storing and transporting portable stationary sheet flow water rides
Ceramic honeycomb structure and its production method
Welding arc termination method and system
Process for machining pressure detection hole and apparatus for machining pressure detection hole
Method and system for edge detection
Funtionalizing cellulosic and lignocellulosic materials
  Randomly Featured Patents
Light emitting diode package with diffuser and method of manufacturing the same
DC-DC converter
Circuit and method for regulating the current flow in a distributorless ignition system coil
Control apparatus for direct injection engine
Plug contact pairing with spark protection
Non-aqueous electrolyte compositions and lithium secondary batteries made thereof
Insulating film and electronic device
Coating die having front and back concave surfaces corresponding to narrow central angles of the guide roll
6-substituted penem compounds
Mulching blade including multiple cutting edges