Territoriality of goods (the area in which goods are marketed) accounts for constant counterfeiting violations. Registration of products in specific market areas ensures protection for the company. For example, company A registers a product in the United States under a specific trademark so that its competitors are not allowed to infringe upon its trademark rights.
同一個例子，如果乙在我國註了冊，而甲將產品輸到我國（即使他在美擁有商標專用權，且註冊較乙在我國早），就是他侵犯到乙，反而他變成仿冒者了。