How many certificates can a patent apply for?

A patent certificate consists of an original and a copy. The number of copies cannot exceed the total number of patentees. Legal basis: Chapter 9, Part V of Patent Examination Guide 1.2.2 Copy of patent certificate If there are more than two patentees of a patent, the patent office may issue a copy of the patent certificate at the request of the same patentee. The number of patent certificates issued for the same patent right shall not exceed the total number of * * * same obligees. After the termination of the patent right, the patent office will no longer issue a copy of the patent certificate.