How many main rights can a patent apply for?

Well, if the essence of your utility model has been well expressed, you can just change the name.

Sovereignty is an independent claim in the application documents. Usually, a claim has only one main right. Sovereignty refers to a claim that reflects the technical scheme of an invention or utility model as a whole and records the necessary technical features needed to solve the technical problems in the claim. Technical features can be understood as the structure or shape adopted to solve the technical problems of an invention or utility model. The scope of protection defined by the main power is the widest.

Dependent claim means that when a claim has multiple claims, if one claim contains all the technical features of another claim and further defines the technical scheme of the other claim, the claim is a dependent claim of the other claim. It can be seen that a claim can have multiple dependent claims, and its function is to further define, so sovereign items and other dependent claims can be defined.

I hope my answer is helpful to you.

Shrimps