It's not required to use the trademark or registered trademark symbols, and some designers feel it clutters the look of the packaging.
The registered trademark symbol, an R in a circle, indicates the preceding logo, slogan, etc. has been formally registered; the trademark symbol, a superscript TM, indicates the mark has not been formally registered.
Facebook is a registered trademark, which earns it the right to use the ® symbol.
The symbol capital R within a circle [®], or circled capital letter R, is the registered trademark symbol. This indicates that the product is registered with a national trademark office (ex: Registered, U.S. Patent and Trademark Office). If a trademark is not officially registered, then it will be marked with a superscript TM (in capitals).
Symbol for "registered trademark"
Typing (r) should autocorrect to the registered trademark symbol.
No. Actually, the superscript TM is for designating trademarks in the US that have not yet been registered with the USPTO. If/when you get the trademark registered with the USPTO, you would use the ® instead.
In order to use the trademark symbol, you need to have registered the design with the trademark office. When you license your image for use by the band, you can specify, for example, how large the trademark symbol must appear, etc.
The law doesn't specify.
The ® symbol can be used after a business name that has been registered as a trademark.
Assuming you are referring to the social networking website, the name "twitter" is a legally registered trademark so it should be used with the ® symbol.
The (R) symbol is used to indicate that the preceding word or phrase is a trademark or service mark that has been registered with the trademark office.
The little TM symbol in a circle represents a trademark. It indicates that the word, phrase, logo, or symbol that it is associated with has been registered as a trademark to protect it from unauthorized use. It signifies ownership and asserts the rights of the trademark owner.