what did benjamin bradley invent
Did You Know: Benjamin Bradley Inventor and Slave Did You Know: Benjamin Bradley in 1856 invented the first steam engine powerful enough to fuel a naval ship, but he was unable to patent his invention because he was a slave. Benjamin Bradley was the first person to develop a working model of a steam engine for a war ship. Born in Maryland around 1830 Bradley was owned by an unidentified slaveholder in Annapolis, Maryland. While living in Annapolis Bradley worked for a printing company at a young age.