The year was 1809. Oliver Evans, Philadelphia inventor, author, and entrepreneur, was having a very bad day. He was in the middle of yet another lawsuit against yet another person who copied Evan’s ...

As the United States marks its 250th anniversary, WTOP presents “250 Years of America,” a multipart series examining the innovations, breakthroughs and pivotal moments that have shaped the nation ...

Discover 25 unlucky inventors who never got to cash in on their inventions. Learn how brilliant minds like Tesla and ...