1, the invention patent protects the method or structure, that is, the method technology can apply for invention, and the structure patent can also apply for invention, but these two patents have higher requirements for innovation;
2. The object of utility model patent protection is product structure, and the improvement of product structure can be protected by applying for utility model patent;
3. The object of appearance patent protection is the appearance of the product, that is, the appearance design of the product can be protected by applying for an appearance patent.