![Patent Nr. 314805](http://image.tmdb.org/t/p/w1280/mbF9tIkUdOLVWbWrrVveIN7xzsT.jpg)
Patent Nr. 314805
Patent Nr. 314805
Patent Nr. 314805 Online Free at Moviesoon. Finnish engineer Eric Tigerstedt solved the dilemma of sound-on-film already before the First World War. All images and sounds in this short film are produced from the surviving test materials originally created in 1914.
- Genres: Documentary
- Country: Finland
- Cast: