The TriLateral Co-operation, begun in 1983 and comprised of the European Patent Office (EPO), the Japan Patent Office (JPO), and the U.S. Patent and Trademark Office (USPTO).
fiveIPoffices, made up of the U.S. Patent and Trademark Office (USPTO), the European Patent Office (EPO), the Japan Patent Office (JPO), the Korean Intellectual Property Office (KIPO), and the State Intellectual Property Office of the People's Republic of China (SIPO).
Asia - Pacific
Eurasian Patent Organization, whose eight members are: the Russian Federation, Turkmenistan, the Republic of Belarus, Republic of Tajikistan, Republic of Kazakhstan, Azerbaijan Republic, Kyrgyz Republic, Republic of Armenia, and the Republic of Moldovahas.
Nordic Patent Institute a collaboration of the Danish Patent and Trademark Office, Norwegian Industrial Property Office, and Icelandic Patent Office. It acts as an International Searching Authority and International Preliminary Examining Authority in the PCT system.
Gulf Cooperation Council Patent Office (GCCPO) whose member states are the United Arab Emirates, Kingdom of Bahrain, Kingdom of Saudi Arabia, Sultanate of Oman, State of Qatar, and State of Kuwait.
Other trade agreements for countries in Africa can be found in the sources listed here in the Treaties page of this guide and from the WTO's Regional Trade Agreements RTA database, and the World Bank's GPTAD database.
The Andean Community (Google Chrome translates the site well) comprised of Bolivia, Colombia, Ecuador and Peru, has established a common regime for IP rights and enforcement.
The European Union, now consisting of 27 nations, is the latest evolution of previous economic common market alliances in the region.
Other trade agreements, and there are many, can be found in the sources listed here in the Treaties page of this guide and from the WTO's Regional Trade Agreements RTA database, and the World Bank's GPTAD database.