Primary trademark register of the USPTO. When a mark has been registered on the Principal Register, the mark is entitled to all the rights provided by the Trademark Act. The advantages of owning a registration on the Principal Register include the following:
- Constructive notice to the public of the registrant's claim of ownership of the mark (15 U.S.C. Section 1072);
- A legal presumption of the registrant's ownership of the mark and the registrant's exclusive right to use the mark nationwide on or in connection with the goods and/or services listed in the registration (15 U.S.C. Sections 1057(b) and 1115(a);
- A date of constructive use of the mark as of the filing date of the application (15 U.S.C. Section 1057(c); TMEP Section 201.02);
- The ability to bring an action concerning the mark in federal court (15 U.S.C. Section 1121);
- The ability to file the U.S. registration with the U.S. Customs Service to prevent importation of infringing foreign goods (15 U.S.C. Section 1124);
- The registrant's exclusive right to use a mark in commerce on or in connection with the goods or services covered by the registration can become "incontestable," subject to certain statutory defenses (15 U.S.C. Sections 1065 and 1115(b)); and
- The use of the U.S. registration as a basis to obtain registration in foreign countries.
Source: U.S. Patent and Trademark Office.