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Patent and Trademark Resource Center: U.S. Trademarks
Trademark Design Code Search
Use this to identify design codes for logo designs. It is the only way to search for non-textual graphical elements commonly found in trademarks. Essential when searching for marks that do not include text.
List of Coordinated Classes
When doing a search on your proposed trademark idea, it's important to not just search the classification code directly related to your business. You should also search the "coordinated classes". For instance, Class 25 (Clothing) is considered "coordinated" with Class 14 (Jewelry). Your trademark search should cover both of those classes to make sure there is no likelihood of confusion.
Corporate Name Search
Unfortunately, Maine does not have a searchable trademark database. Registered Maine trademarks can be found in the Corporate Name Search Database if the registrant's name (or a part of its name) is known. Remember, registration is optional; not all trademarks belonging to Maine companies will be found in the database.
Maine Marks Information - This information outlines the options available for registering a mark with the State of Maine's Secretary of State.
Trademark Assistance Center - is the main support center for all customers, from first-time filers to legal professionals and experienced trademark applicants. They can answer your questions on a variety of trademark topics.