Patent Nr. 314805
Patentti Nr. 314805
Patent Nr. 314805 123Movies. 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
- Country: Finland
- Director: Mika Taanila
- Cast: