An invention patent refers to a new technical scheme proposed for a product, method or its improvement.
Utility model refers to a new technical scheme suitable for practical use for the shape, structure or combination of products. The patent law requires lower creativity and technical level of utility model than invention patent, but it has great practical value.
Design patent refers to a new design with aesthetic feeling and suitable for industrial application based on the shape, pattern or combination of product and the combination of color and shape and pattern. Design refers to the design of industrial products, which is the style of industrial products.