(under subclass 50) Device wherein the open-work panel overlies louver type closures.
SEE OR SEARCH THIS CLASS, SUBCLASS:
74.1+, for louver type closures, the definition thereof; and see the search notes thereto for the loci of other louver type closures.
SEE OR SEARCH CLASS
109, Safes, Bank Protection, or a Related Device,
15, for bank protection devices which include movable louvers.
454, Ventilation,
313+, for a device for admitting air into a ventilated space which includes moveable louvers, subclasses 347+ for an air pump which exhausts air from a ventilated space and which may be associated with moveable louvers, and subclasses 358+ for a device which exhausts air from a ventilated space which may be associated with moveable louvers.
