File:Lee de Forest wireless telegraph headphones.png

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Lee_de_Forest_wireless_telegraph_headphones.png ‎(237 × 209 pixels, file size: 62 KB, MIME type: image/png)

Captions

Captions

Interior of a de Forest Wireless Telegraph station, earliest picture of headphones 1902

Summary[edit]

Description
English: Interior of a de Forest Wireless Telegraph station, earliest picture of headphones 1902
Date
Source

Electric Age Vol. 29, 1902

https://books.google.com/books?id=fd_dEEq4SWAC&pg=PA181
Author Unknown authorUnknown author

Licensing[edit]

Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Lee_de_Forest_wireless_telegraph_headphones.png

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current07:51, 30 April 2023Thumbnail for version as of 07:51, 30 April 2023237 × 209 (62 KB)Guest2625 (talk | contribs)Uploaded a work by Unknown from Electric Age Vol. 29, 1902 https://books.google.com/books?id=fd_dEEq4SWAC&pg=PA181 with UploadWizard

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