PatentGB191209423A:Apparatus for Warning a Ship of its Approach to Large Objects in a Fog.Angemeldetam20.April 1912,veröffentlichtam6.März 1913,Erfinder:Lewis Fry Richardson.
PatentGB191211125A:Apparatus for Warning a Ship at Sea of its Nearness to Large Objects Wholly or Partly under Water.Angemeldetam10.Mai 1912,veröffentlichtam27.März 1913,Erfinder:Lewis Fry Richardson.