An extender for a bed which has a boxspring, and mattress resting squarely on the boxspring, and a bed frame is provided. An elongated cushion provides an extended sleeping area adjacent a portion of the perimeter of the mattress. An elongated support which is substantially coextensive with the cushion...http://www.google.de/patents/US4271547?utm_source=gb-gplus-sharePatent US4271547 - Mattress and boxspring extender
