The symbol ® is a notice of registered trademark ownership. It is used to advise the public that a trademark or service mark is registered, providing notice of the legal ownership status of the mark with which it is used. The ® symbol should be used only in connection with registered trademarks or service marks. 

Should I use TM or R?

Usage. One can use the ® symbol after successful registration of the trademark of the business. On the other hand, when the specific product or the service has a trademark pending in registration, it can use the ™ symbol. In such case the ® symbol cannot be used for such occasions as the mark is yet to be approved.
 

Do I need to use the registered trademark symbol?

Use of trademark symbols is not actually required by law, but doing so is beneficial. In fact, the ^™ and ^SM symbols do not have any legal significance, but instead are informal ways of telling the world that you are claiming ownership of trademark rights in a word, phrase, and/or logo.
 

Can I legally use TM?

Yes, any trademark owner can use the TM symbol at any time. You don’t have to ask for permission or have the approval of the US Patent and Trademark Office. In fact, a trademark owner can continue to use the TM symbol even if the US Patent and Trademark Office rejects their trademark application.

Can I use TM on my logo?

The owner may use the TM symbol regardless of whether an application for registration has been filed or whether the trademark is registered. The owner can continue to use the TM symbol even if an application for registration of the mark is refused.
 

Can I use a logo that is registered?

Once your trademark is registered with the USPTO, you will own the rights to use it anywhere in the U.S. Registering the logo gives you the right to sue to enforce your ownership.