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| Number | Title | Issue Date |
| 7089958 | Damper vane A damper unit for an air circulation system. The damper unit includes a frame defining an air flow opening, a damper vane for opening and closing the air flow opening, and a drive mechanism for turning the damper vane between the open and closed positions. The vane ... | 08/15/2006 |
| 7055231 | Method of manufacturing a prefinished fiberboard shutter A shutter manufacturing method provides a coated manufactured wood substrate sheet. A plurality of attached shutter components are identified. The attached shutter components are configured edge-to-edge and end-to-end so as to comprise the substrate sheet. The attac... | 06/06/2006 |
| 5595536 | Shutter assemblies particularly adapted for use on yachts A shutter assembly for an opening adapted to admit light and/or air. The shutter assembly utilizes laterally spaced base members that define a base plane which extends across the opening. The base members may be relatively angularly disposed or parallel. ... | 01/21/1997 |
| 4643081 | Louver system with adjustable slats, featuring removable modular slat clips The louver system disclosed is of a basic type with adjustable-angle slats arranged between two uprights (1) provided with holes in which swivel mounts (3) are located for the receipt of clips (5) to which the slats (4) are fitted. The single clip (5) is ... | 02/17/1987 |
| 4313650 | Apparatus for controlling light and heat transference for greenhouses Apparatus for controlling light and heat transference to and from a greenhouse comprising a plurality of light-weight, rigid, insulative, slats operable to be selectively opened or closed in venetian blind style to selectively lighten or darken any or all... | 02/02/1982 |
| 4203566 | Air inlet control for aircraft or the like An air inlet control inset in the skin or outer wall surface of an aircraft or the like. The control device has an open position in which it is able to capture ram air flowing over the wall surface and which at the same time defines an open flow area thro... | 05/20/1980 |
| 4199898 | Closure apparatus with snap-in seal strips A snap-in metal strip, longitudinally bent into a V shape with the upper ends of both arms of the V being turned outward to the horizontal, thus creating longitudinal lips on the strip, is used to seal an elongate gap, for example a narrow space between a... | 04/29/1980 |
| 4175480 | Wall ventilator construction An improved ventilator construction for use in masonry wall openings to ventilate interior spaces of a building, such as a basement or crawl space of a home, wherein the ventilator construction is particularly adapted for installation in an existing mason... | 11/27/1979 |
| 4056048 | Emergency ventilation means for confined livestock areas An emergency ventilation means for confined livestock areas comprised of a plurality of louvered openings which are normally closed by means of electrical motors having a high gearing ratio. When power is lost to the confined livestock area a spring on ea... | 11/01/1977 |
| 4038781 | Jamb seal A louver assembly has a plurality of louver blades and pivot shafts pivotally supported for adjustable movement between open and closed position in a frame which includes two opposed vertical side frame members. A jamb seal between each side frame member ... | 08/02/1977 |
