An invention is a product, method or improved technical scheme; The utility model is a technical scheme of utility model for the shape and structure of products or their combinations; The protected object of the invention can be a product or a method; The object of utility model protection is the shape and structure of the product, that is, technologies such as methods, processes and formulas can only apply for invention patents, while products and structures can apply for utility models and invention patents at the same time, but the creative requirements of inventions are higher than those of utility models.