Give an example of invention patent, utility model patent and design patent.

Take a cylindrical cup without a handle as an example:

Invention patent: If you invent a cup filled with minerals, which can turn water into mineral water, you can apply for an invention patent.

Practicality and novelty: design a cup with a handle, and you can apply for a utility model patent.

Design: Generally, cups are cylindrical. If you design a 4-prism, you can apply for an appearance patent.