System and methods for filtering electromagnetic visual, and minimizing acoustic transmissions
US7177075B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 28, 2003 |
| Grant date | Feb 13, 2007 |
| Priority date | — |
| Expiry date | Dec 24, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A combination of filters for filtering selected wavelengths of electromagnetic radiation is provided on a transparent substrate such as a plastic film or glazing of a window. The combination of filters prevents or attenuates the passage of wavelengths through the substrate which would pose a security risk. 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 assistance, and local area networks. The substrate with the combination of filters may be in the form of a bag or a tent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.