Strasbourg Agreement Concerning the International Patent Classification information

Strasbourg Agreement Concerning the International Patent Classification
Signed	24 March 1971
Effective	7 October 1975
Condition	see Article 13 of the Agreement
Parties	65
Depositary	Director-General of WIPO
Language	English, French

The Strasbourg Agreement Concerning the International Patent Classification (or IPC), also known as the IPC Agreement, is an international treaty that established a common classification for patents for invention, inventors' certificates, utility models and utility certificates, known as the "International Patent Classification" (IPC).^[6] The treaty was signed in Strasbourg, France, on 24 March 1971; it entered into force on 7 October 1975^[1] and was amended on 28 September 1979. The Agreement and the certified statement were registered by the World Intellectual Property Organization on 28 February 1980.^[7]

States that are parties to the Paris Convention for the Protection of Industrial Property (1883) may become party to the Strasbourg Agreement.^[8] As of April 2023, there were 65 contracting parties to the Strasbourg Agreement.^[3] The Holy See, the Iran and Liechtenstein signed the Agreement in 1971^[9] but have not ratified it.^[3]

^ ^a ^b Strasbourg Notification No. 17, Strasbourg Agreement Concerning the International Patent Classification
^ Article 13 Strasbourg Agreement Concerning the International Patent Classification
^ ^a ^b ^c WIPO web site, Contracting Parties > Strasbourg Agreement (Total Contracting Parties: 65). Consulted on 18 April 2023.
^ Article 16(1)(c) Strasbourg Agreement Concerning the International Patent Classification
^ Article 16(1)(a) Strasbourg Agreement Concerning the International Patent Classification: "This Agreement shall be signed in a single original in the English and French languages, both texts being equally authentic."
^ Article 1 of the Agreement
^ "Strasbourg Agreement concerning the international patent classification. Done at Strasbourg on 24 March 1971 Succession by Suriname to the above-mentioned Agreement" (PDF). United Nations Treaty Collection. Retrieved 19 April 2023.
^ Article 12(1) of the Agreement
^ Article 16(1)(b) of the Agreement: "This Agreement shall remain open for signature at Strasbourg until September 30, 1971."

[entry-into-force-1] Strasbourg Notification No. 17, Strasbourg Agreement Concerning the International Patent Classification

[2] Article 13 Strasbourg Agreement Concerning the International Patent Classification

[contracting_parties-3] WIPO web site, Contracting Parties > Strasbourg Agreement (Total Contracting Parties: 65). Consulted on 18 April 2023.

[4] Article 16(1)(c) Strasbourg Agreement Concerning the International Patent Classification

[5] Article 16(1)(a) Strasbourg Agreement Concerning the International Patent Classification: "This Agreement shall be signed in a single original in the English and French languages, both texts being equally authentic."

[6] Article 1 of the Agreement

[7] "Strasbourg Agreement concerning the international patent classification. Done at Strasbourg on 24 March 1971 Succession by Suriname to the above-mentioned Agreement" (PDF). United Nations Treaty Collection. Retrieved 19 April 2023.

[8] Article 12(1) of the Agreement

[9] Article 16(1)(b) of the Agreement: "This Agreement shall remain open for signature at Strasbourg until September 30, 1971."

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Signed	24 March 1971 (1971-03-24)
Effective	7 October 1975^[1]
Condition	see Article 13 of the Agreement^[2]
Parties	65^[3]
Depositary	Director-General of WIPO^[4]
Language	English, French^[5]