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| Number | Title | Issue Date |
| 7231808 | Method and apparatus for measuring oxygen content A method and apparatus for measuring the oxygen content in a closed target space, particularly for monitoring inertization levels in an inert gas device for fire prevention and/or fire extinguishing. Toward the aim of proposing a method for measuring the oxygen cont... | 06/19/2007 |
| 7082727 | Hung window with snap-fit assembly A window assembly which includes at least some components which may be assembled in a snap-fit manner. In certain example embodiments, a combination of rotation/pivoting insertion, and a snap-fit assembly engagement of one or more components may be utilized in assem... | 08/01/2006 |
| 6506112 | Ventilator for a glass block window and associated products The invention comprises a ventilator for a glass block window that includes a window frame, a window sash pivotably mounted in the window frame and a screen also pivotably mounted in the window frame. The window sash is pivotable between a closed position... | 01/14/2003 |
| 5315798 | Combined window and vent unit A combined window and vent unit which is vandal resistant yet is versatile in its ventilation and insulation capabilities. There is a freely movable window panel which is positioned in a rigid frame structure without the use of any hinge members yet can b... | 05/31/1994 |
