It has at least been suggested in the "Donald Duck cartoon raising a ship" patent: http://www.iusmentis.com/patents/priorart/donaldduck/ http://www.iusmentis.c

It has at least been suggested in the "Donald Duck cartoon raising a ship" patent: http://www.iusmentis.com/patents/priorart/donaldduck/ http://www.iusmentis.com/patents/priorart/donaldduck/ At the very least, it strikes a serious blow against the novelty aspect.