Use of the ‘TM’, ‘SM’ and ® symbols
‘TM’ Symbol: Generally, one who has filed an application (pending registration) can use the TM (Trademark) symbol with the mark to inform the public of his exclusive claim over the Brand. 

‘SM’ Symbol: An SM symbol indicates Service Mark, which is the same as a Trademark except that it identifies and distinguishes the source of a service rather than a product.

® Symbol: The registration symbol ® may only be used when the mark is registered and the Certificate of Registration is issued by the Trademark Registrar.

Out of all above symbols TM symbol is one of the most popular and widely used symbol to indicate the application or registration of Trademark.

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