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Size of this preview: 478 × 600 pixels. Other resolutions: 191 × 240 pixels | 573 × 719 pixels.
Original file (573 × 719 pixels, file size: 296 KB, MIME type: image/png)
Summary
DescriptionTriple Contact Plug 1907.png |
English: Triple Contact Plug 1907. |
Source | Partial page from 1907 book International Library of Technology: ...Principles of Telephony... International Textbook Company, Scranton, PA; copyright expired. |
Author |
This file is lacking author information.
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Licensing
Public domainPublic domainfalsefalse |
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
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Original upload log
Transferred from en.wikipedia to Commons using For the Common Good.
The original description page was here. All following user names refer to en.wikipedia.
Date/Time | Dimensions | User | Comment |
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22:55, 19 June 2007 | 573 × 719 (303,038 bytes) | w:en:Dicklyon (talk | contribs) | Partial page from 1907 book ''International Library of Technology: ...Principles of Telephony...'' International Textbook Company, Scranton, PA; copyright expired. |
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:45, 2 October 2018 | 573 × 719 (296 KB) | Arlene the bean | Transferred from en.wikipedia: see original upload log above |
File usage
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Metadata
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Horizontal resolution | 28.35 dpc |
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Vertical resolution | 28.35 dpc |
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