37 C.F.R. §2.17(d) Power of attorney relating to multiple applications or registrations.

The owner of an application or registration may appoint a practitioner(s) qualified to practice under §11.14 of this chapter to represent the owner for all existing applications or registrations that have the identical owner name.

An applicant or registrant may appoint a qualified U.S. attorney to represent the owner for all existing applications or registrations that have the identical owner and qualified attorney. 37 C.F.R. §2.17(d).