What inventions can be patented?

China's patent law clearly stipulates that invention refers to a new technical method to improve an existing product, or a certain method, or an article. Inventors submit their inventions to the Patent Office, and only after a series of professional and rigorous examinations can they obtain patent certificates. So there are three kinds of invention patents. First, product invention refers to the inventor making new products that have never appeared before through his own intelligence and creativity, because every country has certain requirements for the protection of product inventions, and not all new products can apply for patent certificates. If it is a product that violates national laws and social interests, such as new drugs, these will definitely not apply for patents. 2. Method invention mainly refers to changing a substance into another substance or other states, adopting new methods or special steps, or even other novel technical means, such as changing a solid substance into a gas substance through this new method, which is called method invention. China's patent law not only protects the patent of this method, but also protects the products and substances manufactured by this new method. 3. Improved inventions refer to inventions or product inventions that actually improve the manufacturing methods of existing products or the manufacturing technology of such products and effectively improve them. Different from the method invention, this improved invention is aimed at the creativity of new products and new methods. It is an innovative technology based on the existing technology and a way to further improve technology and improve efficiency. Generally speaking, in the process of technology development or product development, if the technical level is relatively high, you should apply for an invention patent. In addition, according to the provisions of the patent law, the protection of the invention patent right has a fixed number of years, which is generally 10-20 years. Utility patents are generally 5- 10 years.