Improved frame assembly for doors, windows and the like is provided. The assembly includes a frame defining an opening for receiving and retaining a central panel. The frame is formed from two joined skins which may be molded in the same mold and which are provided with inwardly extending flanges having...http://www.google.de/patents/US4850168?utm_source=gb-gplus-sharePatent US4850168 - Frame assembly for doors, windows and the like
