Image:Railroad coupler diagram.jpg
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Diagram of a knuckle coupler designed by Eli H. Janney.
Image from the application for U.S. Patent 138,405 , filed April 1, 1873.
This image is in the public domain in the United States. In most cases, this means that it was first published in the United States prior to January 1, 1923 (see the talk page for more cases). Other jurisdictions may have other rules, and this image might not be in the public domain outside the United States. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
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- (del) (cur) 18:23, 31 March 2005 . . Slambo (Talk | contribs) . . 876×452 (53,121 bytes) (Diagram of a knuckle coupler designed by Eli H. Janney. Image from the application for {{US patent|138,405}}, filed April 1 1873. {{PD-US}})
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