File:Audio Tron Tube by E.T. Cunningham 1915-1917.jpg
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Summary
| Description |
English: The Audio Tron Tube (1915-1917). Many companies tried to avoid paying royalties to DeForest and Flemming by "bootlegging" tubes or selling an unlicensed product. Cunningham's Audio Tron was one of the most successful bootlegged tubes. |
| Date | |
| Source |
Own work (Original text: Picture of my collection) |
| Author | Engradio |
Licensing
Engradio at English Wikipedia, the copyright holder of this work, hereby publishes it under the following licenses:
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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Transferred from en.wikipedia to Commons by Kelly using CommonsHelper.
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- 2013-02-12 03:45 Engradio 2896×1944× (1103138 bytes) Uploading a self-made file using [[Wikipedia:File_Upload_Wizard|File Upload Wizard]]
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 07:56, 22 February 2014 | | 2,896 × 1,944 (1.05 MB) | File Upload Bot (Magnus Manske) | Transfered from en.wikipedia by User:Kelly using CommonsHelper |
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