The Trademark 5 (TM5) is the name given to a forum of the five largest trademark offices in the world that was set up to promote cooperation and collaboration between members. Its mission is to promote cooperation and collaboration between its members. It does this by exchanging information on practices and programs for increasingly user-friendly and, if possible, interoperable trademark systems. Common projects by the TM5 aim at harmonization or improvement of trademark procedures. The members of the TM5 are:
- the Japan Patent Office (JPO),
- the Korean Intellectual Property Office (KIPO),
- the European Union Intellectual Property Office (EUIPO),
- the Trademark Office of the State Administration for Industry and Commerce of the People's Republic of China (SAIC), and
- the United States Patent and Trademark Office (USPTO).
Altogether, TM5 offices account for about half of all trademark applications filed worldwide. The TM5 is an outgrowth of the Trademark Trilateral, a cooperative framework that JPO, EUIPO, and the USPTO first undertook in 2001. That framework was expanded to include KIPO and SAIC in 2011 and 2012 respectively, and the group became known as TM5.