HD
![Patent Nr. 314805](https://image.tmdb.org/t/p/w600_and_h900_bestv2/mbF9tIkUdOLVWbWrrVveIN7xzsT.jpg)
Patent Nr. 314805
2020 2 min Movie
Patent Nr. 314805
0
2020
2 min
HD
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 ...
Country: Finland
Genre:
Documentary