AIR FILTERS WALL

Brand	Owner	Address	Description
PERMA-COOL	PERMATRON CORPORATION	2020 Touhy Avenue Elk Grove Village IL 60007	air filters for wall and window air-conditioning units for residential and commercial use;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A nasal air filtration device includes a pair of concave-convex filters, and a support structure incorporating a pair of generally annular bases for supporting the filters, and a bridge that couples the bases, to maintain them in a desired spaced-apart relation and to determine a desired angular relationship between the bases and between the associated filters. The support structure is positionable against the anterior nares to direct the filters into their corresponding nasal cavities. The support structure maintains each of the filters in spaced-apart relation to the surrounding nasal wall. In alternative embodiments, an open frame is mounted to each base and positioned between its associated filter and the nasal wall.