Patent Nr. 314805
0
2min
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.
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Genre:
Documentary
Released: 2020-05-17
Countries:
Finland
Production:
Elokuvayhtiö Testifilmi
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