US Patent 8733356 Germicidal protective mask with ultraviolet light emitting diodes

A support has an interior section positionable on one side of a wearer's head. The support has an exterior section positionable over the wearer's face. The exterior section has a free end with a recess. A plurality of light emitters is located in the recess and adapted to function within the germicidal spectrum for air. An electrical assembly is coupled to the light emitters. A shield of light is formed adjacent to the wearer's nose and mouth. When the wearer breathes air, the breathed air becomes sanitized by the passage of pathogens through a curtain of light immediately prior to being breathed.