Resources Contact Us Home
System and method for filtering electromagnetic and visual transmissions and for minimizing acoustic transmissions

Image Number 4 for United States Patent #6891667.

The invention describes a system and methods for filtering electromagnetic and visual transmissions and for minimizing acoustic transmissions. Various combinations of UV, IR, and yellow-tinted filters are applied in various physical configurations to a transparent substrate such as a plastic film or glazing of a window for modifying selected wavelengths of electromagnetic radiation. For instance a light filter may have a multi-layered metallic sputtered stack having a relatively low sheet resistance. The combination of filters prevents or attenuates the passage of selected wavelengths through the substrate as needed to address security risks. The combination of filters is useful to prevent unauthorized data collection and information exchange from or within buildings or otherwise prevent such unauthorized data collection and information exchange from, for example, computer monitors or screens, personal digital assistants, and local area networks.

  Recently Added Patents
Autonomous primary-mirror synchronized reset
Use of deuterium oxide for the treatment of virus-based diseases of the respiratory tract
Thermochromic microparticles, dispersions thereof, and manufacturing method thereof, as well as light-modulating coatings, light-modulating films and light-modulating inks
Load balancing for parallel tasks
Data scrambling in memory devices
Method and apparatus for information exchange over a web based environment
Noise spectrum tracking in noisy acoustical signals
  Randomly Featured Patents
Transmission and gear changing method
Method and implementation for addressing and accessing an expanded read only memory (ROM)
Optical low pass filter
Disk brake comprising an adjuster module
Method, apparatus and computer readable storage medium
Memory cell fuse circuit and controlling method thereof
Game device changing action of game object depending on input position, storage medium for storing game program and method used in game device
Mono-and polybenzyl-1,2,3,4-tetrahydronaphthalene compositions, use of said compositions or mixture of monobenzyl-,1,2,3,4-tetrahydronaphthalene as heat transfer fluid
Circuit for comparison of signal voltage with reference voltage