Trademark law is the term given to all of the legal issues surrounding the use of trademarks. A trademark, service mark, or trade mark is any identification indicator or sign that is used by a business or an individual in order to identify its products and services. Trademarks are very important from a business point of view, and as a type of intellectual property they often need to be protected through intellectual property law. A trademark can be a phrase, logo, word, design, or image, as well as any combination of these elements. There are a number of lawyers around the world who specialise in trademark law, some of whom deal with the issues surrounding trademarks and intellectual property in an exclusive and dedicated fashion.

The primary purpose of a trademark is as an identification symbol, linking a particular product or service to a particular image or word. Many businesses rely on their trademarks as a way to identify with their customers and stake holders, making them a vital asset in the marketing of any organisation. From a legal point of view, a trademark is a form of intellectual property, with an associated set of rights and regulations. Most of the primary issues addressed regularly by trademark lawyers relate to either trademark registration or trademark infringement. Trademark law can be complex at times, and specialised trademark lawyers need to keep up to date with all of the latest cases and developments.

The extent to which individual trademarks can be enforced depend on a number of different criteria, such as the country of registration, the similarity of the product, and the fair use policy within certain jurisdictions. Trademarks play an important role in modern capitalist society, and the legal issues surrounding them are often numerous and complex. A specialised trademark lawyer (Anwalt Markenrecht) is able to deal with the issues surrounding trademark registration and infringement, with many also specialising in related legal services such as patents, copyright, and consumer protection.