DISPOSABLE PROTECTIVE THREE LAYER RESPIRATORY

Brand	Owner	Address	Description
AER GUARD	Porcat	241 CLARA CT FREMONT CA 94539	Disposable protective three layer respiratory masks, not for medical purposes;AIR;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A protective, switchable layer adapted for use in transient imageable documents is disclosed. The protective layer can be disposed on an underlying photochromic layer and enables writing or imaging the underlying layer. The protective layer prevents unintentional writing on the photochromic layer, such as can otherwise occur from exposure to certain wavelengths of light.