Patent Nr. 314805 (2020)
Finnish engineer Eric Tigerstedt solved the dilemma of sound-on-film already before World War I. All images and sounds in this short film are produced from the surviving test materials originally created in 1914.
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Also known as:
- (DE) Patent Nr. 314805
- (EN) Patent Nr. 314805
- (ES) Patent Nr. 314805
- (FR) Patent Nr. 314805
- (FI) Patentti Nro. 314805
