![Patent Nr. 314805](https://i0.wp.com/www.themoviedb.org/t/p/w185/mbF9tIkUdOLVWbWrrVveIN7xzsT.jpg)
Patent Nr. 314805
Patentti Nr. 314805
Patent Nr. 314805 Movie Online Soaper TV. 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.
- Genre: Documentary
- Cast: