Registration on the USPTO's Principal Register offers valuable substantive benefits to a trade mark owner. However, certain marks – such as those that may be considered descriptive of certain features of the goods or services recited in the Application – are not eligible for registration on the Principal Register absent a showing of secondary meaning. If a trade mark owner is unable to obtain a registration on the Principal Register, there are still federal registration options available that can provide the owner with certain protections. One such option that a trade mark owner can consider is seeking registration on the PTO's Supplemental Register.