A product may bear a registered trademark symbol (®) once the trademark has been registered with the United States Patent and Trademark Office (USPTO) and the registration has become effective. The registered trademark symbol is used to indicate that the trademark has been registered and that the owner of the trademark has the exclusive right to use the trademark in connection with the specified goods or services.
The registered trademark symbol may be used on a product once the trademark has been registered and the registration has become effective, regardless of whether the product is being offered for sale or is being used for promotional or other purposes.
It is important to note that the use of the registered trademark symbol is optional, and the owner of a trademark is not required to use the symbol in order to claim trademark rights. However, the use of the registered trademark symbol can be helpful in deterring others from using the trademark and in establishing the owner's exclusive rights to the trademark.
It is a good idea to consult with a trademark attorney or other professional to determine when it is appropriate to use the registered trademark symbol and to ensure that the symbol is used correctly.