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The '''Strasbourg Agreement Concerning the International Patent Classification''' (or '''IPC'''), also known as the '''IPC Agreement''', was signed in [[Strasbourg]], [[France]], on March 24, 1971 and entered into force on October 7, 1975. It establishes a common classification for [[patent]]s for [[invention]], [[inventors’ certificate]]s, [[utility model]]s and [[utility certificate]]s, known as the “[[International Patent Classification]]” (IPC).<ref>Article 1 of the Agreement</ref> The Agreement was amended on September 28, 1979.

States party to the [[Paris Convention for the Protection of Industrial Property]] (1883) may become party to the Strasbourg Agreement.<ref>Article 12(1) of the Agreement</ref> As of May 2013, there are 62 contracting parties to the Strasbourg Agreement.<ref name="wipo contracting parties">WIPO web site, [http://www.wipo.int/treaties/en/ShowResults.jsp?lang=en&treaty_id=11 ''Contracting Parties > Strasbourg Agreement (Total Contracting Parties : 62)'']. Consulted on 16 May 2013.</ref> The [[Holy See]], the [[Iran]] and [[Liechtenstein]] signed the Agreement in 1971<ref>Article 16(1)(b) of the Agreement: "This Agreement shall remain open for signature at Strasbourg until September 30, 1971."</ref> but have not ratified it.<ref name="wipo contracting parties"/>

==See also==
*[[European Convention on the International Classification of Patents for Invention]] (1954)

==Notes==
{{reflist}}

==External links==
*[http://www.wipo.int/treaties/en/classification/strasbourg/ Strasbourg Agreement Concerning the International Patent Classification] in the [[WIPO Lex]] database — official website of [[WIPO]].
** The full text of the [http://www.wipo.int/wipolex/en/treaties/text.jsp?file_id=291858 Strasbourg Agreement Concerning the International Patent Classification]{{ref-en}}

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