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Class Information
Number: 454/278
Name: Ventilation > Having inlet airway > Including specific cover or shield for exterior vent opening > Wall type > Louver > Having moveable vanes
Description: Subject matter comprising means for relocating the slats or slat portions either (1) individually or (2) simultaneously or (3) as a unit along with supporting structure therefore.

Patents under this class:

Patent Number Title Of Patent Date Issued
8550888 Actuator for a fan-powered damper Oct. 8, 2013
8535126 Air flow control mechanism and methods Sep. 17, 2013
8033900 Low profile animal restricting vent for fluid discharge conduits Oct. 11, 2011
7837335 Projector Nov. 23, 2010
7487922 Windmill damper operator Feb. 10, 2009
7089958 Damper vane Aug. 15, 2006
6895719 Floor-mounted disposable system with moveable dust loosening rib insert May. 24, 2005
5595536 Shutter assemblies particularly adapted for use on yachts Jan. 21, 1997
4643081 Louver system with adjustable slats, featuring removable modular slat clips Feb. 17, 1987
4313650 Apparatus for controlling light and heat transference for greenhouses Feb. 2, 1982
4203566 Air inlet control for aircraft or the like May. 20, 1980
4199898 Closure apparatus with snap-in seal strips Apr. 29, 1980
4175480 Wall ventilator construction Nov. 27, 1979
4056048 Emergency ventilation means for confined livestock areas Nov. 1, 1977
4038781 Jamb seal Aug. 2, 1977

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