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Summary
DescriptionCross-flow fan schematic patent.png
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 domainPublic domainfalsefalse
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 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.
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
media type
image/png
checksum
b2e876d0a5212fd9bbf013fe63f81457d7fd5b5d
determination method: SHA-1
data size
23,709 byte
height
1,037 pixel
width
1,359 pixel
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19:01, 10 June 2014
1,359 × 1,037 (23 KB)
Hankwang
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