The Supplemental Register is provided by the United States Patent and Trademark Office (USPTO) as a way to federally register certain types of US trademarks. Although it doesn’t offer all of the benefits and protections of the Principal Register, it’s still a valuable tool that should be utilized under appropriate circumstances.
The USPTO maintains two separate trademark registers. The Principal Register is reserved for trademarks that are considered “distinctive.” On the other hand, the Supplemental Register is for trademarks that have not yet acquired distinctiveness or “secondary meaning” in the minds of consumers.