extension: what do TM and r mean;
the r trademark is a registered trademark, which is corresponding to the TM trademark. There are the following differences between the r trademark and the TM trademark:
1. The representation marks of the r trademark and the TM trademark are different. R trademark circle r, TM trademark with the letter TM.
2. The legal effects of R trademark and TM trademark are different. R trademark is strictly protected by law and belongs to a registered trademark.
3. The R trademark is exclusive, and no one or organization can use it at will except the trademark owner.