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
Digital rights management for media streams
Method for producing vinyl acetate monomer
Method and apparatus for sensing an input object relative to a sensing region of an ultrasound sensor device
Per-request control of DNS behavior
Detection of procedural deficiency across multiple business applications
Memristive junction with intrinsic rectifier
Vending machine
  Randomly Featured Patents
Tape cassette with pressable cap for fixing reel on reel base
High compliance monofilament surgical sutures comprising poly[alkylene terephthalate-co-(2-alkenyl or alkyl)succinate]
Method and apparatus for attaching an IC package to a PCB assembly
Method and machine for underfilling an assembly to form a semiconductor package
Integrated method and device for a dual stage micro-actuator and suspension design for the hard disk driver
Tortilla toaster
Pharmaceutical coating materials soluble or swellable in gastric juice and pharmaceutical dosage forms coated therewith
Forming refractory masses
Image sensor, method of manufacturing the same, and method of operating the same
Maintenance station for an ink cartridge for a printer