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File:Cross-flow fan schematic patent.png

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Summary

Description
English: Cross-flow fan, drawing from US Pat. No. 507,445 (October 1893), with minor clean-up. Full patent text: https://www.google.com/patents/US507445
Date
Source US Pat. no. 507,445
Author Paul Mortier

Licensing

Public domain 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}}.

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Public domain
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.
United States
United States
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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inception

24 October 1893Gregorian

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Date/TimeThumbnailDimensionsUserComment
current19:01, 10 June 2014Thumbnail for version as of 19:01, 10 June 20141,359 × 1,037 (23 KB)HankwangUser created page with UploadWizard

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