Video History Project

Chronology

Valdemar Poulsen

Date
1893
Valdemar Poulsen invents Telegraphon, the first magnetic recorder.
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"Valdemar Poulsen." Video History Project, Experimental Television Center, 2011. https://www.videohistoryproject.org/valdemar-poulsen.

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Last modified 16 May 2011

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