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History
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Valdemar Poulsen (c. 1898)
Valdemar Poulsen (c. 1898)
Poulsen's magnetic wire recorder
Poulsen's magnetic wire recorder
Poulsen's 1900 US patent for a magnetic wire recorder
Poulsen's 1900 US patent for a magnetic wire recorder
"Telephonograph after Poulsen, for permanently fixing and conveniently repeating a telephonic conversation." From a 1911 catalog of physical apparatus
"Telephonograph after Poulsen, for permanently fixing and conveniently repeating a telephonic conversation." From a 1911 catalog of physical apparatuses.
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A Webster-Chicago Model 7 wire recorder from 1948
A Webster-Chicago Model 7 wire recorder from 1948
Poulsen Telegraphone recorder from 1922.
Poulsen Telegraphone recorder from 1922.
First US patent issued 1900 for a magnetic wire recorder by inventor Valdemar Poulsen
First US patent issued 1900 for a magnetic wire recorder by inventor Valdemar Poulsen
German Reichhalter Reporter W102 wire recorder (c. 1950)
German Reichhalter Reporter W102 wire recorder (c. 1950)