The symbol that means 'registered' is a ®.
Yes, you can use the copyright symbol () even if your work is not registered. The symbol indicates that the work is protected by copyright law, whether it is registered or not.
The registered trademark symbol should be used when a brand name or logo has been officially registered with the government to protect its ownership and rights.
Registered Nurse....
No, you do not have to use the registered trademark symbol every time you mention a trademarked term.
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"
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.
You can put a trademark symbol on your product before it is registered. However, it isn't backed by anything official and it could be copied or imitated.
The ® symbol can be used after a business name that has been registered as a trademark.
Facebook is a registered trademark, which earns it the right to use the ® symbol.
The law doesn't specify.
No, that symbol indicates a registered trade mark.