File and register a trademark to protect your business name or product name. Applying to register a trademark is simple and affordable with LegalZoom.Find out how to get started with this easytofollow explanation of how the registration process works, how much it costs, how long it takes and more. Maryland Trademark Attorneys. Building a name for your business takes a lot of time and effort. To register a business name for a sole proprietorship or partnership file a trade name application with the Maryland Department of assessments and Taxation. 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. Filing for a trademark can protect your brand. This simple guide talks you through filing the paperwork, what it costs, and more. Learn how to register, protect, and maintain your branding material with trademark law.