Patent application is a legal system to protect the intellectual property rights of inventions and creations under the conditions of market economy. All inventions with patent conditions should apply for patents as soon as possible in order to obtain legal protection from the state. Applying for a patent has the following advantages: 1) Determine the ownership relationship of inventions and creations through legal procedures, thus effectively protecting the achievements of inventions and creations, monopolizing the market, and obtaining the maximum benefits. 2) Strive for initiative in market competition and ensure the safety of production and sales. 3) The state has certain support policies for patent applications and will give certain policy and economic assistance. 4) constitute a technical barrier. If others want to develop similar technologies or products, they must obtain the consent of the patentee. 5) It can promote the upgrading of products, improve the technical content of products, improve the quality of products, reduce costs, and make the products of enterprises invincible in the market competition. 6) Enterprises with independent intellectual property rights are not only powerful enterprises that consumers long for, but also the main target groups supported by various government policies. 7) In addition to the above functions, having a certain number of patents is also an important indicator in the evaluation of listing. In short, patents can be used as a shield to protect their own technology and products; It can also be used as a spear to attack opponents' aggression. Making full use of the function of patent will greatly promote the production and operation of enterprises.