Many of the world’s most famous inventors only produced one major invention that garnered recognition and cemented their prominent status. But Garret Augustus Morgan, one of the country’s most successful African-American inventors, created two – the gas mask and the traffic signal.

Born in the last quarter of the nineteenth century to former slaves, Garrett A. Morgan was only formally educated to a sixth-grade level. Fortunately, like many great inventors, Morgan had an innate mechanical mind that enabled him to solve problems. And, unlike most other inventors, he also was a skilled entrepreneur.

After moving to Cleveland, Ohio, at the age of 18, Garrett Morgan’s business sense and strong work ethic led him to almost immediate success. He invented and patented the first chemical hair straightener, started his own sewing equipment repair business, and even established a newspaper – the Cleveland Call.

But Morgan’s most prolific accomplishments came in his role as an inventor. He received a patent for the first gas mask invention in 1914, but it wasn’t until two years later that the idea really took off. When a group of workers got stuck in a tunnel below Lake Erie after an explosion, Morgan and a team of men donned the masks to help get them out. After the rescue was a success, requests for the masks began pouring in.

Similarly, Garrett Morgan’s other famous invention – the traffic signal – was also invented to help save lives. After witnessing an accident on a roadway, Morgan decided a device was needed to keep cars, buggies and pedestrians from colliding. His traffic signal was designed to stand on a street corner and notify vehicles and walkers whether they should stop or go. After receiving a patent in 1923, the rights to the invention were eventually purchased by General Electric.