File:Ernst Ruhmer radiotelephone transmitter circa 1905.jpg
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Summary
| Description |
English: Photograph of Ernst Ruhmer radiotelephone transmitter circa 1905 |
| Date | |
| Source | Photograph included on page 47 of the 1918 edition of Radio Telephony, by Alfred N. Goldsmith |
| Author | Book illustration |
Licensing
|
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. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:12, 14 February 2018 | | 664 × 498 (172 KB) | Thomas H. White | User created page with UploadWizard |
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