In the 1870s he was known as a first-class inventor and companies were demanding work. Its largest customer was Western Bell. His most famous invention was the light bulb. It allowed users to have access to an on-demand light source wherever there was electricity. After his revolutionary invention, he essentially put all his eggs in one basket and opened the Edison Lighting Companies, which later became known as General Electric. Even though his main focus was his electric company, he still found time for his passion, inventing. He managed to invent the phonograph, the motion picture camera, and the alkaline battery, among many others. In addition to his professional life he has managed to have a satisfying family life. Edison married his first wife, Mary Stilwell in 1871, they had three children together, two of whom had the nicknames Dot and Dash due to his obsession with communication and Morse code. His wife died of uncertain causes in 1884, and Edison remarried in 1886 to Mina Miller. Together they had three children, in total he had six