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Patent Nr. 314805

20202mMovieDocumentary

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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Patent Nr. 314805 was released on May 17, 2020 but we couldn't find it on any streaming service yet. Rights can change — try again later.

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