Explanation: World Intellectual Property Organization (WIPO)-Administered Treaties for Classifications:

• The Nice Agreement (1957) establishes a classification of goods and services for the purposes of registering trademarks and service marks (the Nice Classification).
• The Locarno Agreement (1968) establishes a classification for industrial designs (the Locarno Classification).
• The Vienna Agreement (1973) establishes a classification (the Vienna Classification) for marks that consist of, or contain, figurative elements.
• The International Patent Classification (1971) is used to classify patents and utility models according to the different areas of technology to which they pertain. It was established by the Strasbourg Agreement.

Source: ForumIAS