The difference between R mark and tm mark is that TM is a trademark mark and R is a registered trademark mark, and their legal protection is different. In the case that the trademark has not yet become a registered trademark, the mark "TM" is used to tell the public that this graphic or text is a "trademark" of goods or services, not a name or an advertisement, so as to prevent the graphic or text marked by it from flowing into the public domain, unable to apply for being a registered trademark and enjoying exclusive rights; At the same time, marking "TM" can also be used as proof that the graphic or text is used as a trademark. When applying for registration of a trademark, it enjoys the prior right to use it.