PA450 Post-Issuance Remedial Action - Domestic PA450 Post-Issuance Remedial Action - Domestic All actions associated with completing activities in connection with any necessary remedial action, after issuance of a patent in the ('domestic') home country of the applicant, such as the filing of a Certificate of Correction, and correcting patent term in view of patent term adjustment (mis)calculation in the U.S.. Note that government fees and external expenses are included under E100.