1. Invention patent: mainly used for the invention of new products, new processes and new technologies. Compared with strict review, it has to go through two stages: formal review and substantive review.

2. Patent for utility model: The relevant invention mainly used for product improvement, the examination is relatively loose, and only formal examination is needed.

3. Appearance patent: it is mainly used to improve the shape of products and protect the appearance of products, and the examination is relatively loose.