A large percentage of issued patents contain errors. A patent is enforceable as it is granted. Therefore errors have a bearing on the enforceability of a patent. This makes proofreading of an issued patent a critical prosecution step.

The Patent Proofreading Department (PPD) at Clairvolex comprises a team of well trained proofreaders headed by a director of the company. The team uses a combination of electronic and manual proofreading processes and proprietary tools to ensure multi layer quality control. Technical quality control support is rendered by experienced patent attorneys who review the work reports and make recommendations for filing of the Certificate of Correction (CoC).