Patent Nr. 314805

Original title: Patentti Nr. 314805
Duration: 2 min
Release date: 2020-05-17
IMDB

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.

Documentary

Patentti Nr. 314805

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