Matches in DBpedia 2015-10 for { ?s ?p "Ezra J. Warner of Waterbury, Connecticut was an American inventor, who patented his design of a can opener in 1858. Crudely shaped bayonet and sickle combo, his design was widely accepted by the U.S. military during the period of the American Civil War.Can openers were needed because early cans were robust containers, which weighed more than food and required ingenuity to open, using whatever tools available."@en }
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- Ezra_Warner_(inventor) comment "Ezra J. Warner of Waterbury, Connecticut was an American inventor, who patented his design of a can opener in 1858. Crudely shaped bayonet and sickle combo, his design was widely accepted by the U.S. military during the period of the American Civil War.Can openers were needed because early cans were robust containers, which weighed more than food and required ingenuity to open, using whatever tools available.".