Invention belongs to the technical category, but it is not absolute technology. An invention can only be protected if it meets the requirements of national laws and ethics. For example, someone invented the latest tools for stealing or taking drugs, which is technically profitable, but it does not meet the requirements of law and ethics, so it is impossible to apply for a patent.
Utility model: The so-called utility model refers to a new practical scheme for the shape, structure or combination of products. The utility model patent only applies to products, not to process methods.
Appearance design: refers to the new aesthetic design of the appearance, pattern, color or their combination of products and its application in industry. Design must be attached to the product, if it exists alone because it likes to open the product, it is not a design in patent law; Appearance design is only limited to the artistic design of product appearance, and does not involve the technical performance of the product.