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[ Doorway air curtains in the form of environmental control apparatus for use in controlling air flow and temperature at entrance door ways of refrigerated, air conditioned or heated rooms and buildings; accessories for the foregoing, namely, mounting brackets specially adapted for use with air curtains, noise isolation dampeners specially adapted for use with air curtains for mounting to ceilings and walls, and air curtain filters]

Air curtain accessories, namely, air curtain door activated switches, which activate and deactivate the air curtain by opening and closing the door, namely, electric pressure switches, electric magnetic reed switches, electric wireless switches, and electric motion sensors; air curtain accessories, namely, remote controls for automatically and manually controlling air curtains, and electric control panels for automatically and manually controlling air curtains