Patent Nr. 314805

Patent Nr. 314805 (2020)

Documentary

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.

  • Release Date: 2020-05-17
  • Runtime: 0h 2min
  • Production Company: Elokuvayhtiö Testifilmi
  • Production Country: Finland
  • Director:

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