As per various studies, over 90% of patents issued by the USPTO have errors related to the claimed terms, dependency in claims, claim duplicity, cited references, inventor names, specifications, etc. It is imperative for assignees to proofread patents to identify all the PTO/Applicant errors in a patent, ensure that these errors are not detrimental to a patent’s enforceability, ensure that the claim coverage of a patent is not altered and/or limited, the overall scope of a patent is not adversely affected.Effectual Services patent proofreading process is an extremely detailed analysis of a patent’s prosecution history to identify any PTO or applicant error. Our team members run thorough manual as well as automated checks simultaneously to ensure that a patent is free of any errors. Further, our teams ensure that all grammatical errors, typographical errors, and legal errors are eliminated. We review the entire specifications including drawing and report all errors to our clients to decide upon the next steps. We also prepare Certificate of Correction that can be filed with the PTO. This adds value to the issued patents.