Collaboration. When a Party assumes the responsibilities for the prosecution and maintenance of a Patent under [Section 12.3(a)(ii), 12.3(b)(ii), 12.3(c)(ii) or 14.3(b)])])])], the other Party shall promptly transfer to such Party the patent prosecution files for such Patent and provide reasonable assistance in the transfer of the prosecution responsibilities. The

Cooperation. Each Party will provide the other Party all reasonable assistance and cooperation in the Prosecution and Maintenance efforts with respect to any Relay Patent or Joint Collaboration Patent, including providing any necessary powers of attorney and executing any other required documents or instruments for such prosecution and taking all actions necessary to correct any error or mistake in inventorship. When a Party assumes the responsibilities for the Prosecution and Maintenance of a Patent under Section 12.8.1, the other Party will promptly transfer to such Party the patent prosecution files for such Patent and provide reasonable assistance in the transfer of the prosecution responsibilities. The Party assuming such Prosecution and Maintenance responsibilities will have the right to engage its own counsel to do so.