File:Haunted swing patent.jpg
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Summary
| Description |
English: Drawing showing a cutaway of the haunted swing illusion. Figure 1 from US patent 508227A. |
| Date | |
| Source | https://worldwide.espacenet.com/patent/search/family/002577057/publication/US508227A?q=pn%3DUS508227A |
| Author | Amariah Lake |
Licensing
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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}}. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:47, 26 January 2020 | | 1,616 × 2,473 (897 KB) | Adderengebroed | User created page with UploadWizard |
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