National defense patent refers to an invention patent that involves national defense interests, has a potential role in national defense construction and needs to be kept confidential. Therefore, national defense patents are confidential patents. If your invention meets the requirements for applying for a national defense patent, you can apply for a national defense patent. National defense patents are only invention patents, not utility models and designs. If your patent application has been submitted to China National Intellectual Property Administration and declared as a utility model, it will not be converted into a national defense patent in the preliminary examination if it does not involve national defense interests.

The application fee and annual fee for the national defense patent shall be paid by the applicant; The state shall compensate the patentee of national defense. After issuing the national defense patent certificate, the national defense patent institution shall pay the national defense patent compensation fee to the national defense patentee, and the specific amount shall be determined by the national defense patent institution.