This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionCalculatingMachinePatentBurroughs.jpg
English: Drawing for a Calculating Machine, 08/21/1888. This is the printed patent drawing for a calculating machine invented by William S. Burroughs. From the National Archives.
The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d), 37 CFR 1.84(s)
The original patent contains no such notice, so its contents are in the public domain.
Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}}.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country. Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:CalculatingMachinePatentBurroughs.jpg
Captions
Add a one-line explanation of what this file represents
calculadora inventada por William s. burrougs-8/21/1888
{{Information |Description=Drawing for a Calculating Machine, 08/21/1888. This is the printed patent drawing for a calculating machine invented by William S. Burroughs. From the National Archives. |Source=http://en.wikipedia.org/wiki/Image:CalculatingMa