According to the characteristics of the patent application, determine its types: according to the provisions of China's patent law, patents can be divided into three types: invention patents, utility model patents and design patents: a. Invention refers to a new technical scheme proposed for a product, method or its improvement. B. Utility model: refers to a new practical technical scheme for the shape, structure or combination of products. C. Appearance design: refers to a new design that is aesthetically pleasing and suitable for industrial application based on the shape, pattern or combination of colors, shapes and patterns of products.