Where an application for a patent includes more than two inventions, the applicant may file a divisional application on his own initiative or according to the examination opinions of the examiner. The application for division shall be made on the basis of the original application (the first application). The divisional application shall fill in the application number and application date of the original application in the request; If the applicant has filed a divisional application and needs to file a divisional application again, the application number of the divisional application shall also be filled in the brackets after the application number of the original application.
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