There are local intellectual property offices and agencies. Local intellectual property offices do their daily work, and the agency is the accepting institution of patent applications, which is responsible for issuing licenses or certificates. Patents collected by this institution are submitted to the International Intellectual Property Office for unified evaluation and authorization.
To apply for a patent, if it is a company, it is most appropriate to find a patent agency. If it's a person, it's a little troublesome. You can consult the local agency.