A patent application is a request made by an inventor, designer or other subject who has the right to apply to the Patent Office for a patent right for invention or design. According to the provisions of China's patent law, an application for a patent shall be submitted to the Patent Office with an application, specification, patent claim, abstract, drawings and a request for priority. Among them, the appended drawings and priority claims are not essential to every application, but they are beneficial to patent applications. A patent application shall be in written form, mainly including the following contents: the request, the name of the invention or design, the name and identity of the applicant, the name and identity of the agent and the signature.