US Patent 8074698 Window blind system

A window blind frame system is provided comprising a window blind secured to a frame and optionally at least one frame-securing clip for releasably retaining the frame in position relative to the window casing. The frame may comprise at least two angle joints connecting at least three extruded portions to form a substantially rigid structure, wherein a window blind may be attached to the frame and wherein the frame is configured to interact with a frame-securing clip which releasably retains the frame in position relative to a window casing. The components of the window blind frame system may be provided in kit form. Methods of assembly and fitting of the window blind frame system are also provided.