Signals Defense, LLC was founded in Owings Mills, Maryland in 1999 with the introduction of an innovative optically clear window film technology that provides high RF (Radio Frequency) and IR (Infrared) attenuation for RF Shielding and Thermal Imaging Defense purposes. Signals Defense patented window technology has been engineered to meet stringent US Intelligence community security requirements for facilities handling classified information.

Our technology is the de facto written standard for the US Government and for organizations desiring to properly secure locations handling sensitive and/or classified information. Signals Defense window films meet the TEMPEST requirement for the Intelligence Community Directive ICD 705 and the DoD Infrared and Radio Frequency Emanation Protection Standards.