In the age of globalization, trademarks have become more and more important assets not only of companies but also of countries. The contribution of well-known trademarks such as COCA-COLA, IBM, NOKIA, TOYOTA, and HONDA into the national economies is very large and quite remarkable. The traditional principles of trademark law have been challenged by the modern conditions of the world economy. Especially in the case of the well-known trademark, that protection is based not only on national law but also on the international legal framework. International attempts during the past time in order to build up a global regime of well-known trademark protection have been realized by many international conventions and treaties. Those have established legal foundations for the protection of well-known trademarks in worldwide. From a theoretical perspective, well-known trademarks and the protection of well-known trademarks have increasingly become important topics engaging the thoughts of scholars all over the world. There have been many books and research works dealing with issues concerning well-known trademark protection in theory and legislation.