TM means that the trademark has been applied to the National Trademark Office, and the National Trademark Office has also issued a "Notice of Acceptance" and entered the opposition period, which can prevent others from filing repeated applications. , also means that existing trademark holders have priority to use it. R means the registration has been successful. LOGO is the symbol of a product or enterprise. If it is registered, it is called a registered trademark. If it is not registered, it is an ordinary trademark. The degree of protection received by countries varies. The consequence of adding R and TM is that others cannot use it without authorization, nor can they apply for it.