Previously, in a case when inventors were omitted or information thereof was miswritten when filing a patent application, this could only be corrected while the application was pending, and thus the correction was not permitted after registration.
However, as the Enforcement Regulations were revised, inventors may now be added or information thereof may be corrected even after the decision of allowance. To this end, a document executed by all the inventors is required.

The relevant revised Enforcement Regulations came into effect on June 10, 2019.