Patent certificate is a legal document issued by the patent office to the patent applicant after the patent application has passed the examination. The patent certificate records the name of the invention-creation, the name of the applicant for the invention-creation, the starting date of the patent right, the application number and the patent number.
According to the Patent Law, the examination and approval procedure of an application for a patent for invention includes five stages: acceptance, preliminary examination, publication, substantive examination and authorization. The authorization process of invention patent is relatively long, generally from the submission of application, one or two years to at least half a year, before authorization can be obtained, so as to obtain the invention patent certificate. The term of the invention patent right is twenty years, counting from the date of application.