US Patent 7412800 Latching and anti-bow mechanism for a window

A latching system for a double-hung window including upper latches and anti-bow latches where the upper latches and the anti-bow latches are operated by a common activating mechanism for ease of use of the window. A single activating mechanism may be utilized for latches on both sides of a window, or separate activating mechanisms may be used for each side of the window.