Any person who adopts and uses a mark in Maryland may file in the Office of the Secretary of State an application for registration of the mark. A trademark is a name, symbol, word, or combination of 2 or more of these that a person places on goods that the person sells or distributes.To register a mark in Maryland, the applicant must complete and submit the application form, including: • The applicant's: – name; and. – business address. You should file a trade name to let the Maryland DAT know. To register a business name for a sole proprietorship or partnership file a trade name application with the Maryland Department of assessments and Taxation. The most common penalty for trademark infringement is an injunction or a cease-and-desist letter directing the infringer to stop using the trademarked material. First, your business name must include the words "limited liability company" or an approved abbreviation. A trademark in Maryland represents intellectual property protection for a business name or logo at the national level. Common law trademarks are enforceable but subject to proof.