Patent Nr. 314805 (2020)
Premiere 17 May 2020 | Patentti Nr. 314805 | 2 min | Documentary
• 73 views • 0 thumbs up • 0 thumbs down
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.
