If you are an owner of either a supplemental registration or of common law rights, and you are challenging another party before the TTAB based on priority and likelihood of confusion, you would face similar hurdles. Only a trademark registration on the principal register will receive all the rights provided by the Trademark Act of 1946. A Principal Registration is entitled to: (1) constructive notice to the public of the registrants claim of ownership; (2) a legal presumption of ownership of the mark and of the exclusive rights to use the mark in commerce for the goods and services listed in the registration; (3) a date of constructive use of the mark as of the filing date of the application; (4) the ability to bring an action concerning the mark in federal court and to rely on the presumptions of ownership and exclusive right to use; and (5) acquiring “incontestable” status for the goods and services identified in the application, subject to certain statutory defenses.
There are additional rights granted to marks on the Principal Register, but the ones listed above apply only to marks on the principal register and not to marks on the supplemental register. The additional rights which apply both to the principal and supplemental register include: (1) use of the registration symbol ® with the mark; (2) filing suit in federal court for infringement, but note that the owner of the supplemental registration must prove it owns a proprietary interest in the mark by showing the mark has acquired secondary meaning before the adverse party’s priority date; (3) protection against registration of a confusingly similar mark under the Trademark Act, but marks on the principal register will receive broad protection while marks on the supplemental register will generally receive narrow protection based on how descriptive the mark is for the identified goods and services; and (4) the registration can be used as a basis for filing in a foreign country under the Paris Convention and other international agreements.
Regarding challenges before the Board (aka TTAB), the owner of a supplemental registration will have standing to oppose, but will still have to prove secondary meaning/acquired distinctiveness. Since marks on the supplemental register are presumed to be merely descriptive, evidence of secondary meaning must be submitted to the TTAB. If such evidence is not submitted, the Board will find against the owner of the supplemental registration and dismiss the notice of opposition with prejudice. See Otter Products LLC, v. BaseOneLabs LLC, 105 USPQ2d 1252 (TTAB 2012).