A ™ (TM) is usually used to indicate an unregistered trademark. It is
an informal notification that there is a public claim as a trademark.
The ® (commonly pronounced "R-in-a-circle" or "Circle-R") (R) is a
warning notice to advise the public that the mark is registered and
their use provides legal benefits. This notice can be used only with
registered marks. Use of a ® with any unregistered trademark may
result in claims of fraud. Several other countries also use the ®
symbol to indicate that a trademark or service mark is registered in
their respective systems.
