Legal basis: Chapter 9, Part V of Patent Examination Guide 1.2.4 Correction of printing errors of patent certificates.
When there is a typographical error in the patent certificate, the patentee may return the certificate and request the Patent Office to correct it. If the patent office verifies that it is a typographical error, it shall correct it and issue a replacement card to the patentee. The original certificate is marked with the word "changed" and then kept in the patent application documents.
If the patent certificate is lost, it will not be reissued unless it is caused by the Patent Office.
Extended data
Guide to Patent Examination 1.2.3 Replacement of Patent Certificates
After the dispute over the ownership of the patent right is mediated by the local intellectual property management department or the people's court and the patent right is returned to the claimant, and the mediation or judgment becomes legally effective, the parties concerned may request the Patent Office to change the patent certificate after going through the formalities for changing the patentee. If the patent certificate is damaged, the patentee may request the replacement of the patent certificate.
After the termination of the patent right, the patent office will not replace the patent certificate. If the name of the patentee changes due to the transfer of the patent right or the renaming of the patentee, the patent certificate shall not be replaced.
Anyone who requests to change the patent certificate shall return the original patent certificate and pay the handling fee. After receiving the request for replacing the patent certificate, the Patent Office shall verify the patent application documents. If it meets the requirements, the patent certificate can be re-made and sent to the parties. The replaced certificate shall be consistent with the format and content of the original patent certificate. The original certificate records the word "changed" and then stores it in the patent application document.
Baidu Encyclopedia-Patent Examination Guide