. "Canadian inventor" . "John Patch (1781 \u2013 August 27, 1861) was a Canadian fisherman who invented one of the first versions of the screw propeller."@en . . "John Patch"@en . "1861-08-27Z"^^ . . . . "1781Z"^^ . "Patch, John"@en . . . . . "1861Z"^^ . .