Patentti Nr. 314805
Patentti Nr. 314805 su Tantifilm e CB01. 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.
- Genere: Documentario
- Paese: Finland
- Direttore: Mika Taanila
- Attori: