A trademark lawyer specializes in the legal aspects of trademarks, which are symbols, words, or phrases that distinguish goods or services from others. They help clients register their trademarks with the United States Patent and Trademark Office (USPTO) and ensure that their intellectual property is protected from infringement. In addition to registration, trademark lawyers provide guidance on how to enforce trademark rights and handle disputes. They may represent clients in court if someone uses a trademark without permission, helping to maintain the integrity of the brand and its reputation in the marketplace.