Lee De Forest — American Inventor born on August 26, 1873, died on June 30, 1961
Lee de Forest was an American inventor, self-described "Father of Radio", and a pioneer in the development of sound-on-film recording used for motion pictures. He had over 180 patents, but also a tumultuous career—he boasted that he made, then lost, four fortunes. He was also involved in several major patent lawsuits, spent a substantial part of his income on legal bills, and was even tried for mail fraud. His most famous invention, in 1906, was the three-element "grid Audion", which, although he had only a limited understanding of how it worked, provided the foundation for the development of vacuum tube technology... (wikipedia)