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Trademark Symbols
how to display your mark
Use of the "TM", "SM" and "®" Trademark Symbols If you want to claim the rights of a name or logo, use the TM (trademark) or SM (service mark) designation to give notice to the public about your claim. This use of the TM or SM Trademark Symbol does not indicate a legally enforceable trademark.
The registration symbol, ®, however, does carry legal weight. It may only be used when the mark is registered in the PTO. The ® symbol may be used only after the registration has been approved by the U.S. trademark office.
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