File:Arthur William Chapman Apparatus.png
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Summary
editDescriptionArthur William Chapman Apparatus.png |
English: Image from the patent of a physical exerciser invented in 1937. |
Date | |
Source | https://patentimages.storage.googleapis.com/64/73/3c/d4dcbcc33fa133/US2106994.pdf |
Author | Arthur William Chapman |
Licensing
editPublic domainPublic domainfalsefalse |
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In general, the contents of United States patents are in the public domain.
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The original patent should be checked for the presence of such language before an assumption is made that the contents are in the public domain. (This template can be replaced by {{PD-US-patent-no notice}} in such cases.) |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:05, 21 August 2023 | ![]() | 1,641 × 2,770 (75 KB) | Obscure2020 (talk | contribs) | Extracted original image from PDF source using Inkscape. Re-cropped using GIMP. Then optimized with OxiPNG and ZopfliPNG. |
09:39, 11 August 2020 | ![]() | 885 × 1,455 (115 KB) | Malev (talk | contribs) | Uploaded a work by Arthur William Chapman from https://patentimages.storage.googleapis.com/64/73/3c/d4dcbcc33fa133/US2106994.pdf with UploadWizard |
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