What patents can the law major apply for?

Can't! Patent refers to inventions protected by the patent law, that is, patented technology, which is a proprietary technology recognized by the state and protected by law on the basis of publicity. The "patent" here refers to technical methods-technologies or schemes protected by national laws. The so-called proprietary technology is the technology with exclusive rights, which is a bigger concept, including patented technology and technical secrets. Some professional technologies that do not belong to patents and technical secrets are meaningful only in some technical service contracts. A patent is an invention protected by legal norms. It is an invention that submits a patent application to the national examination and approval authority, and after passing the examination according to law, the patent applicant is granted the exclusive right to the invention within the time specified by the country, and the annual fee needs to be paid regularly to maintain the protection status in the country.