Legal analysis: The difference between joint trademarks and defensive trademarks is: 1. Joint trademarks are suitable for companies that only operate one type of products; 2. Defensive trademarks are suitable for companies that operate multiple types of products; 3. Joint trademarks are Register similar product trademarks in the same category of trademarks to ensure the exclusivity of your products in this type of trademark; 4. Defensive trademarks are to register trademarks in all types of trademarks to ensure that your trademark is included in all categories of trademarks of exclusivity. The registration purposes of defensive trademarks and joint trademarks are the same: to protect well-known trademarks from infringement and prevent others from insinuating them.

Legal basis: "Trademark Law of the People's Republic of China" Article 10 The following signs shall not be used as trademarks: (1) The same as the country name, national flag, national emblem, The national anthem, military flag, military emblem, military song, medal, etc. are the same or similar, and are the same as the name or logo of a central state agency, the name of a specific place where it is located, or the name or graphics of a landmark building; (2) The same as a foreign country The name, national flag, national emblem, military flag, etc. are the same or similar, except with the consent of the government of the country; (3) The name, flag, emblem, etc. of the intergovernmental international organization are the same or similar, except with the consent of the organization or it is not likely to mislead Except for the public; (4) Identical or similar to the official signs and inspection marks indicating the implementation of control and guarantee, except those authorized; (5) The same names and signs as the "Red Cross" and "Red Crescent" or similar; (6) ethnically discriminatory; (7) deceptive and likely to cause the public to misunderstand the quality and other characteristics of the product or its origin; (8) harmful to socialist morals or other adverse effects. Place names of administrative divisions at or above the county level or foreign place names known to the public shall not be used as trademarks. However, exceptions are made where place names have other meanings or are part of collective trademarks or certification marks; registered trademarks using place names will continue to be valid.