Is the national defense patent an invention patent?

National defense patent is an invention patent, and invention refers to a new technical scheme proposed for a product, method or its improvement. 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. Article 2 of the Regulations on National Defense Patents refers to invention patents that involve national defense interests and have potential impact on national defense construction and need to be kept confidential.