John Ericsson (July 31, 1803 – March 8, 1889) was a Swedish inventor and mechanical engineer, as was his brother, Nils Ericson. He was born in Sweden, but primarily came to be active in the United States.
Benson John Lossing, ed. Harper's Encyclopedia of United States History (vol. 3) (New York, NY: Harper and Brothers, 1912)