File:Pat248872Fig1.jpg
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| 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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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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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/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 15:19, 29 September 2018 | | 320 × 360 (30 KB) | Arlene the bean (talk | contribs) | Transferred from en.wikipedia: see original upload log above |
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