Neither the brochure nor the sun shape of the logo were published with a copyright notice and were not registered for copyright within five years, as verified by a search of the U.S. Copyright Office's Copyright Catalog (1978 to present) for entries marked as filed by Corona Data Systems. Per United States law, works published between 1978 and 1989 without a copyright notice and not registered for copyright within five years of publication are in the public domain.
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This work is in the public domain because it was published in the United States between 1978 and March 1, 1989 without a copyright notice, and its copyright was not subsequently registered with the U.S. Copyright Office within 5 years.
Unless its author has been dead for several years, it is copyrighted in the countries or areas that do not apply the rule of the shorter term for US works, such as Canada (50 pma), Mainland China (50 pma, not Hong Kong or Macau), Germany (70 pma), Mexico (100 pma), Switzerland (70 pma), and other countries with individual treaties. See this page for further explanation.
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== {{int:filedesc}} == {{Information |Description={{en|Logo of Corona Data Systems}} |Source=Own vectorization, adapated from https://www.1000bit.it/js/web/viewer.html?file=%2Fad%2Fbro%2Fcorona%2Fcoronapersonalcomputers.pdf |Date={{other dates|~|1982}} |Author=Corona Data Systems |Permission=Neither the brochure nor the sun shape of the logo were published with a copyright notice and were not registered for copyright within five years, as verified by a search of th...