The use of TM means the trademark symbol, that is, the words, graphics or symbols marked with TM are trademarks, but they are not necessarily registered (unregistered ones are not protected by law). TM is the abbreviation of English trademark.

Famous trademarks in the international market are often registered in many countries. There is a distinction between "registered trademarks" and "unregistered trademarks" in China. Registered trademarks are trademarks that are protected by law after being registered with relevant government departments. Unregistered trademarks are not protected by trademark laws.

Extended information:

The Trademark Law stipulates that the following signs shall not be used as trademarks:

(1) The same as the name of the country, the People’s Republic of China, The national flag, national emblem, military flag, medals are the same or similar, and they are the same as the name of a specific place where the central state agency is located or the name or figure of a landmark building;

(2) The same as the name of a foreign country, The national flag, national emblem, or military flag is the same or similar, except with the consent of the government of that country;

(3) The name, flag, or emblem of an intergovernmental international organization is the same as or similar, except with the consent of the organization or Except those that are not likely to mislead the public;

(4) Identical or similar to official marks or inspection marks indicating implementation of control and guarantee, except those authorized;

(5) The same or similar names or symbols as the "Red Cross" or "Red Crescent";

(6) Ethnic discriminatory;

(7) Exaggerated propaganda and Deceptive;

(8) Harmful to socialist morals or having other adverse effects.

Baidu Encyclopedia-Trademark