1. A document that corrects an error in an official document, such as a certificate of incorporation.
2. Patents. A document issued by the U.S. Patent and Trademark Office after a patentee or assignee rectifies a minor error unrelated to either questions of ownership or else defects in a patent application’s specifi-cations or drawings. • The certificate can correct only three types of errors: (1) mistakes made by the PTO, (2) minor clerical or typographical errors, and (3) the omission or misidentification of an inventor’s name. 35 USCA §§ 254–256. Cf. reissue patent under PATENT(3). [Cases: Patents 126. C.J.S. Patents §§ 215–216.]