DescriptionRead the hamster manual advertisement.jpg
English: from Popular Science magazine, April 1948, this ad from Gulf Hamstery appeared on a page full of classified ads. This same ad appeared in other issues of this magazine and other magazines targeting a similar audience perhaps between 1948-1951.
This ad appeared with no copyright notice in the magazine.
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.