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Title: Edison Voicewriter (with microphone and transformer), 1938 [Go to resource]
Description: Edison Voicewriter (with microphone and transformer), 1938 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1938 Source: Science Museum Creator: Edison (maker) Identifier: 1962-206 Go to resource More Like this...
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