Marjorie Joyner (née Stewart)
Marjorie Joyner was the first African American woman to create and patent a permanent hair-wave machine. She was highly visible in the African American community in Chicago, once serving as
Marjorie Joyner was the first African American woman to create and patent a permanent hair-wave machine. She was highly visible in the African American community in Chicago, once serving as
In 1966, Brown invented a video home security system. Her idea, which has expanded beyond just security for homes, has influenced security systems in businesses around the world.