Patent Nr. 314805 (2020)

Trailer Movies

Patent Nr. 314805 (2020)

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: May 17, 2020

Duration: 2m

Quality: HD

Genres: Documentary

Actors:

Country: Finland