Thomas Alva Edison, one of the most prolific inventors in history, dies in West Orange, New Jersey, at the age of 84. Born in Milan, Ohio, in 1847, Edison received little formal schooling, which was customary for most Americans at the time. He developed serious hearing problems at an early age, and this disability provided the motivation for many of his inventions. At age 16, he found work as a telegraph operator and soon was devoting much of his energy and natural ingenuity toward improving the telegraph system itself. By 1869, he was pursuing invention full-time and in 1876 moved into a laboratory and machine shop in Menlo Park, New Jersey.