The Story of Lee De Forest

Inventor lee de forest invented the triode vacuum tube, which made possible electronic amplification and therefore long distance telephone and commercial radio. By 19 19 he had abandoned his earlier work in telephone and radio to concentrate on perfecting the process of recording sound on film. That year, he patented a process he called phono film. De forest took his sound films on a tour of the united states to introduce the public to the idea of talking pictures. In doing this, he was also greatly annoying the physicist theodore case, who had done most of the actual work of developingphono film. Case attended to forest's presentation in 19 23 and was irked that his own name and contributions