Image:US Patent 18,883 diagram.jpg
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The diagram from U.S. Patent 18,883, an improved steam locomotive fire arch by George S. Griggs. Patent awarded December 15, 1857.
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In general, the contents of United States patents are in the public domain.[1] In specific cases, patent applicants and holders may claim copyright in portions of those documents. In those specific cases, applicants are required to identify the portions that are protected under copyright, and are additionally required to state the following within the body of the application and patent:[2] [3] 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. |
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 03:00, 30 June 2005 | 397×543 (34 KB) | Slambo (Talk | contribs) | (The diagram from {{US patent|18,883}}, an improved steam locomotive fire arch by George S. Griggs. Patent awarded December 15 1857. {{PD-US-patent}}) |
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