Image:Fleming Valve - US Patent 803,684.jpg
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[edit] Summary
| Description |
United States Patent 803,684; first sheet. Illustrations of the 'Fleming Valve', the first useful vacuum tube. John Ambrose Fleming, inventor. |
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| Source |
United States Patent Office. |
| Date |
November 7,. 1905. |
| Author |
United States Patent Office (John Ambrose Fleming, inventor). |
| Permission (Reusing this image) |
Public domain - original work of the US Federal Government. Note that the text and figures of all US Patents are in the public domain. |
[edit] Licensing
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This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright.
Note: This only applies to works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. العربية | Български | Česky | Deutsch | English | Español | Français | Magyar | Italiano | 日本語 | 한국어 | Polski | Português | 中文(繁體) | 中文(简体) | +/- |
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| Date/Time | Dimensions | User | Comment | |
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| current | 20:02, 4 March 2007 | 1,567×2,626 (823 KB) | Daderot | ({{Information |Description=United States Patent 803,684; first sheet. Illustrations of the 'Fleming Valve', the first useful vacuum tube. John Ambrose Fleming, inventor. |Source=United States Patent Office. |Date=November 7,. 1905. |Author=United States P) |
