Profession: Mechanical Inventor
Why Famous: Considered one of the most influential mechanical inventors in history, Ericsson developed the first screw-propeller, later put to use on the USS Princeton, which became the US Navy's first screw-propeller driven steam frigate.
He also developed the first rotating turret on the USS Monitor, which ended up saving a blockade squadron during the American Civil War.
- 1835-07-13 Swedish-American inventor John Ericsson files for a patent for his screw propeller design
- John Ericsson - Lemelson-MIT