John Ericsson was a Swedish inventor and mechanical engineer, as was his brother, Nils Ericson. He was born at Långbanshyttan in Värmland, Sweden, but primarily came to be active in the United States Wikipedia
The definitive Wikipedia entry for John Ericsson. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/John_Ericsson
John Ericsson invented the ship propeller and incorporated the landmark device into his design for the Civil War ironclad the Monitor. www.invent.org/hall_of_fame/54.html
John Ericsson (1803-89) konstruerade frst en effektiv propeller och den amerikanska pansarbten Monitor. www.delectus.se/soren/staty/F/John_Ericsson_Fallstedt.html