File:Diode-tube.png
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Diode-tube.png (487 × 452 pixels, file size: 9 KB, MIME type: image/png)
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An illustration of a vacuum tube diode. Detail of illustration from U.S. patent number 803684, issued November 7, 1905 to John Ambrose Fleming (1849-1945).
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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.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:28, 10 February 2005 | | 487 × 452 (9 KB) | IMeowbot~commonswiki (talk | contribs) | {{PD}} |
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