The circle R on the trademark is the mark of "registered trademark". The R in the circle is the first letter of register in English, which means that the trademark has been applied for registration with the National Trademark Office and has been reviewed by the Trademark Office. After passing, it became a registered trademark and has been protected by law. The TM on the trademark is the trademark symbol, and TM is the abbreviation of English trademark. This means that the trademark has been applied to the National Trademark Office, which prevents others from filing duplicate applications. It also means that existing trademark holders have priority to use it. Just like submitting a patent application and waiting for approval by the National Patent Office, other people's identical applications will not be accepted after the application.