Category:Telegraphon
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magnetic recording device invented by Valdemar Poulsed in 1898 | |||||
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Media in category "Telegraphon"
The following 18 files are in this category, out of 18 total.
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Dailygraph.jpg 144 × 160; 10 KB
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PSM V59 D424 The telegraphone.png 1,189 × 1,833; 521 KB
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Telefon0001 a.JPG 1,600 × 1,168; 494 KB
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Telegrafon 8154 cropped.jpg 1,170 × 877; 531 KB
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Telegrafon 8154-2.jpg 1,295 × 1,054; 1.06 MB
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Telegrafon 8154.jpg 1,600 × 1,200; 470 KB
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TELEGRAPHON - Anzeige.png 1,070 × 736; 905 KB
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Telegraphon 02.jpg 1,600 × 1,168; 399 KB
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Telegraphon.jpg 420 × 286; 7 KB
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Telegraphone wire recorder 1922.jpg 502 × 560; 96 KB
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Telegraphone with operator LCCN2003671093.jpg 1,221 × 1,536; 222 KB
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Telegraphone with operator LCCN2003671093.tif 1,221 × 1,536; 1.79 MB
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Telegraphone with operator.png 1,221 × 1,536; 809 KB
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Telegraphone.png 400 × 570; 282 KB
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Textophone 1920.jpg 126 × 180; 7 KB
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US Patent 661,619 - Magnetic recorder.jpg 1,641 × 2,648; 1.27 MB