Thomas A. Edison, Inc.

"Thomas A. Edison, Incorporated (originally the National Phonograph Company) was the main holding company for the various manufacturing companies established by the inventor and entrepreneur Thomas Edison. It was a successor to Edison Manufacturing Company and operated between 1911 and 1957, when it merged with McGraw Electric to form McGraw-Edison." - ( 25.07.2020)

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Walzen-Phonograph Edison StandardWalzen-Phonograph Edison StandardDiktiergerät Edison EdiphoneWalzen-Phonograph Edison GEM BPhonograph "The Phonograph"Trichterlautsprecher für Edison Phonographen
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