Strasbourg Agreement Concerning the International Patent Classification

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]

Strasbourg Agreement Concerning the International Patent Classification

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]

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]

See also

• European Convention on the International Classification of Patents for Invention (1954)