How do I request a Certificate of Correction for a patent?

This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.

To request a Certificate of Correction for a patent, you should:

• Address your request to the Commissioner for Patents, Office of Data Management, Attention: Certificates of Correction Branch, P.O. Box 1450, Alexandria, VA 22313-1450.
• If filing electronically, use the document description: “Request for Certificate of Correction.”
• Use the special Certificate of Correction form, PTO/SB/44 (also known as Form PTO-1050).
• Include a signed request identifying support in the application for any Office errors in the patent.

As stated in the MPEP, “Applicants, or their attorneys or agents, are urged to submit the text of the correction on a special Certificate of Correction form, PTO/SB/44 (also referred to as Form PTO-1050), which can serve as the camera copy for use in direct offset printing of the certificate of correction.“