Patents are divided into inventions, utility models and designs. "Agricultural national invention patent", which literally means invention patent, is only used in the agricultural field. But its specific application in which field has nothing to do with self-protection.
Regarding the difference between invention patents and utility models, when judging the novelty of patents, invention patents need to have outstanding substantive features and significant progress, while utility models only need substantive features and progress. In addition, the utility model does not protect the method, but the invention can protect the product and method.
Definition: According to Article 2 of the Patent Law, invention refers to a new technical scheme for products, methods and their improvement. The utility model is a new practical technical scheme for the shape, structure or combination of products.