supplemental register
supplemental register. Trademarks. A roll of trademarks that are ineligible for listing on the Principal Register because they are not distinctive. • Marks on the supplemental list are not protected by trademark law, except to the extent that the listing may bar the registration of similar marks. The listing may be required, however, for a mark to be registered in other countries. 15 USCA § 1091. — Also termed secondary register. [Cases: Trade Regulation 151. C.J.S. Trade-Marks, Trade-Names, and Unfair Competition §§ 147, 153.]