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What is the difference between the notations TM or SM and the ®?
Any time you claim rights in a mark, you may use the "TM" (trademark) or "SM" (service mark) designation to alert the public to your claim, regardless of whether you have filed an application with the USPTO. However, you may use the federal registration symbol "®" only after the USPTO actually registers a mark, and not while an application is pending. Also, you may use the registration symbol with the mark only on or in connection with the goods and/or services listed in the federal trademark registration.
不知道怎么翻译合适,大致正确的是:不管你申请、注册与否,你都可以用TM或SM来宣示商标权,但是使用"®"必须是注册商标生效后。
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