At present, there are two ways for China to apply for a patent, one is to entrust a legally established patent agency to handle it, and the other is to submit the application materials to the Beijing Patent Office in person. Due to geographical location, time cost and other factors, most patent applications are handled through agencies at present, and it is not excluded that powerful large enterprises set up their own legal departments to take charge of patent applications.
Legal basis: Article 36 of the Patent Law of People's Republic of China (PRC). When requesting substantive examination, the applicant for a patent for invention shall submit reference materials related to his invention before the filing date.
Where an application for a patent for invention is filed in a foreign country, the patent administration department of the State Council may require the applicant to submit the information retrieved during the examination of his application in that country or the information on the examination results within a specified time limit; If the application is not submitted within the time limit without justifiable reasons, the application shall be deemed to have been withdrawn.