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현재 인터넷에는 전세계적으로 적용되는 공통된 저작권법이 없습니다.[http://www.copyright.gov/fls/fl100.html]대신에, [[베른 협약]] 가입국은 그들의 법률을 베른 협약이 규정하는 최소한의 기준에 맞추어야 할 의무가 있습니다. 그러나 베른협약은 자기집행조약이 아니며, 국내법에 우선하지도 않습니다. 이런 이유로, 저작권이 존재하는가 아닌가는 각국의 저작권법에 따라 다릅니다.
미국 저작권법에 따르면, 1923년 1월 1일 이전에 미국에서 공표된 어떤 저작물도, 저작권이 없습니다.<ref name="US1909">Strictly speaking, only U.S. works published before [[January 1]] [[1923]] and foreign works published in compliance with U.S. formalities (registration, © notice) before that date are in the public domain in the U.S. For non-U.S. works published ''without'' compliance with U.S. formalities (i.e., without © notice), the situation is a bit more complicated:
==미국법상의 퍼블릭 도메인==
*If published before 1909, such works are in the public domain in the U.S.
*[[:EN:Wikipedia:Image copyright tags/Public domain]] 참조
*If published between 1909 and 1922 (inclusive) in a language ''other than English'', the [[United States federal judicial circuits|Ninth Circuit]] has considered them as "unpublished works" according to [http://www.copyright.cornell.edu/training/Hirtle_Public_Domain.htm#Footnote_11 Peter Hirtle] and following the decision of the [[United States Court of Appeals for the Ninth Circuit]] in the case ''[http://caselaw.lp.findlaw.com/scripts/getcase.pl?court=9th&navby=case&no=9515250 Twin Books v. Disney]'' in 1996. The case was about the book [[Bambi, A Life in the Woods]]; the decision is heavily criticized in ''Nimmer on Copyright'' (ISBN 0-820-51465-9), the standard commentary on U.S. copyright law.
*[http://copyright.cornell.edu/resources/publicdomain.cfm 관련 설명 참조]
*If published between 1909 and 1922 (inclusive) in English, they are ''highly likely'' to be PD, given that the aforementioned controversial case was only about a work published in a foreign language.
*Additionally, any work first published outside of the United States without copyright notice prior to 1989, when the U.S. joined the Berne Convention, is in the public domain in the U.S. if it was in the public domain in its country of origin on the URAA date (in most cases [[January 1]], [[1996]]). See the section on [[#Country-specific rules|country-specific rules]] for more information.
Also, the 1923 cut-off date applies only to the U.S. This means foreign works first published before 1923 are in the public domain in the U.S., but may still be copyrighted outside the U.S.</ref>
==대한민국에서 공표된 것 중 퍼블릭 도메인==
===보호받지 못하는 저작물===
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