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Pat248872Fig1.jpg (320 × 360 pixels, file size: 30 KB, MIME type: image/jpeg)

Summary

Description
English: Illustration from 1881 US Patent 248872, for a perpetual calendar paperweight. The upper section is rotated to reveal one of seven lists of years (splitting leap years) for which the seven calendars below apply.
Source

Figure 1 from US Patent 248872, granted Nov 1, 1881 to Robert McCurdy for a perpetual calendar paperweight.

As one of the drawings submitted by McCurdy to the USPTO to substantiate his patent claims, it is public domain.
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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}}.

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
13:11, 17 September 2011 320 × 360 (30,776 bytes) w:en:The Monster (talk | contribs) Figure 1 from US Patent 248872, granted Nov 1, 1881 to Robert McCurdy for a perpetual calendar paperweight. As one of the drawings submitted by McCurdy to the USPTO to substantiate his patent claims, it is public domain.

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Date/TimeThumbnailDimensionsUserComment
current15:19, 29 September 2018Thumbnail for version as of 15:19, 29 September 2018320 × 360 (30 KB)Arlene the beanTransferred from en.wikipedia: see original upload log above

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