Final answer:
The World Trade Organization (WTO) established the TRIPS Agreement to protect intellectual property and patent rights among member nations.
Step-by-step explanation:
The international body that established a treaty to protect its member nations from intellectual property and patent theft is the World Trade Organization (WTO). The name of the treaty established for this purpose is the Trade-Related Aspects of Intellectual Property Rights (TRIPS) Agreement. This agreement was part of the results of the Uruguay Round of the General Agreement on Tariffs and Trade (GATT) negotiations, which were finalized in 1994 and which led to the formal creation of the WTO on January 1, 1995.