A trademark is any word, name, symbol or device that one entity uses to distinguish its goods and services from the goods and services of others. Trademarks are the brands by which goods and services are identified. Unlike patent law or copyright law, which both have their roots in the United States Constitution, trademark law is an outgrowth of the common law of unfair competition. Trademark law is designed to prevent consumer confusion in the marketplace and at its heart, the federal trademark act remains a consumer protection statute.