2. Patent for utility model: Utility model refers to a new technical scheme suitable for practical use proposed by the pointer for the shape, structure or combination of products. The protection period of utility model patent is 10 year.
3. Invention patent: Invention refers to a new technical scheme proposed for a product, method or its improvement. Unlike utility model patents, invention patents can be both products and methods, while utility model patents must be products. The protection period of invention patent is the longest in domestic patent classification, which is as long as 20 years.