1. 
   Movietone
   (from the article `motion picture, history of the`) ...sound-on-film system (whose similarity to De Forest`s Phonofilm was the subject of subsequent patent litigation) and formed the Fox-Case ...
   Found op http://www.britannica.com/eb/a-z/m/131
   
   
2. 
   Movietone
   The first system of recording sound directly on film. It was invented by Theodore W. Case, Earl I. Sponable and engineers from General Electric specifically for the Fox film group
   Found op http://www.allmovie.com/glossary/term/movietone
   
   

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