According to the Patent Law of People's Republic of China (PRC)? Article 31 stipulates that an application for a patent for an invention or utility model shall be limited to one invention or utility model. Two or more inventions or utility models belonging to a general inventive concept may be filed as one application.
An application for a patent for a design shall be limited to a design used by a product. Two or more designs of products sold or used in the same category in sets may be filed as one application.
Extended data:
The relevant requirements of the new patent stipulate that:
1. After receiving an application for a patent for utility model or design, the Patent Office, after preliminary examination, finds that it conforms to the provisions of this Law, and will not conduct substantive examination, and immediately announce and notify the applicant.
2. Within three months from the date of the announcement of the patent application, anyone may raise an objection to the application in accordance with these regulations. The Patent Office shall send a copy of the objection to the applicant, and the applicant shall submit a written reply within three months from the date of receiving the copy of the objection.
China People's Congress Network-People's Republic of China (PRC) Patent Law