Answer R or TM is just a trademark status mark, there is no mandatory requirement. R or "note" (in a circle) simply indicates that the trademark is a registered trademark. TM is in the process of registration but has not issued a certificate. It is just a reminder to others. It does not mean that the trademark is not marked R or registered, so it can be used indiscriminately. If you want to use an unregistered trademark name, it is best to check it online on our website first. If there is no identical or similar one, register it for use.