The benefits of a full class of trademarks are as follows:

1. After you register it yourself, it will be more difficult for anyone else to register the same or similar trademark in any major class. This will cause many people to give up applying for registration of identical or similar trademarks in this category. If you have not registered in the 45 major categories, after you have gained a certain reputation, others may register the same or similar trademarks in certain categories.

2. Once the registration is successful, if others use it without consent, you can ask others to stop using it to prevent your trademark from being diluted.

3. If others take a fancy to a trademark in a certain category, they may spend a lot of money to buy it and earn a fee for themselves.