Madrid Protocol

One of two treaties comprising the Madrid System for international registration of trademarks. The protocol is a filing treaty and not a substantive harmonization treaty. It provides a cost-effective and efficient way for trademark holders — individuals and businesses — to ensure protection for their marks in multiple countries through the filing of one application with a single office, in one language, with one set of fees, in one currency.

https://www.wipo.int/treaties/en/text.jsp?file_id=283484

See also Madrid Agreement

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