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Commons:Hirtle chart as well as a
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This work is in the public domain in the United States because it was
published in the United States between 1929 and 1977, inclusive, without a
copyright notice. For further explanation, see
Commons:Hirtle chart as well as a
detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the
rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50
p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
Textual information (e.g. timestamp) once visible in the image itself has been moved into the image metadata and/or image description page. This makes the image easier to reuse and more language-neutral, and makes the text easier to process and search for. Commons
discourages placing visible textual information in images. All licenses accepted on Commons permit this type of modification as a derivative work.
If attribution information were removed and the image is not public domain, replace this tag with
{{Attribution metadata from licensed image}}.