Utility model refers to a new technical scheme suitable for practical use for the shape, structure or combination of products. The scope of patent protection for utility model is relatively wide, which only protects new products with a certain shape or structure, and does not protect methods and substances without a fixed shape. The technical scheme of the utility model pays more attention to practicality, and its technical level is lower than that of the invention. Most countries' utility model patents protect relatively simple and improved technological inventions, which can be called "small inventions".
An invention refers to a new technical scheme proposed for a product, method or its improvement. The so-called products refer to all kinds of new products that can be manufactured in industry, including solids, liquids and gases with certain shapes and structures. The so-called method refers to the method of processing raw materials and making various products. The invention patent does not seek the technical achievements that can be directly applied to industrial production through practice, but it can be a solution to technical problems or an idea with the possibility of industrial application. However, this technical scheme or idea cannot be confused with a simple topic or idea, because a simple topic or idea does not have the possibility of industrial application.
China National Intellectual Property Administration is the only institution in China that has the right to accept patent applications. China National Intellectual Property Administration has representative offices all over the country, accepting patent application documents and charging various patent fees.