German trademark law is, like all other national trademark law, influenced by international and supranational legal norms. The most well-known is surely the Madrid Agreement (Madrid Agreement Concerning the International Registration of Marks) from 1891. It is a very old agreement that gives countries which are parties to the agreement the facility to protect nationally registered trademarks in another country. National trademarks can thus become internationally registered trademarks (IR, or international registration).
Trademark law is identification law, stipulating what can be protected as a trademark. Word marks and combinations of letters and numbers (figures) may be protected, along with figurative marks and combined word marks and figurative marks. Trademark protection can be obtained for color marks, sound marks, claims, advertising slogans, three-dimensional marks, and work titles. Indications of geographic origin, on the other hand, may not be protected as an individual right.