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

1. (1) The owner of an application or registration may appoint a practitioner(s) qualified to practice under §11.14 of this chapter for up to twenty applications or registrations that have the identical owner name and attorney through TEAS.
2. (2) The owner of an application or registration may file a power of attorney that relates to more than one trademark application or registration, or to all existing and future applications and registrations of that owner, on paper. A person relying on such a power of attorney must:
3. (i) Include a copy of the previously filed power of attorney; or
4. (ii) Refer to the power of attorney, specifying the filing date of the previously filed power of attorney; the application serial number (if known), registration number, or inter partes proceeding number for which the original power of attorney was filed; and the name of the person who signed the power of attorney; or, if the application serial number is not known, submit a copy of the application or a copy of the mark, and specify the filing date.

Using TEAS, at http://www.uspto.gov, an applicant or registrant may appoint a qualified practitioner for up to 20 existing applications or registrations that have the identical owner and qualified practitioner. 37 C.F.R. §2.17(d)(1). A power of attorney relating to future applications cannot be filed through TEAS.

An applicant or registrant may file a power of attorney on paper that relates to more than one trademark application or registration, or to all existing and future applications and registrations. Someone relying on such a power of attorney must: (1) include a copy of the previously filed power of attorney; or (2) refer to the previously filed power of attorney, specifying: the filing date of the power; the application serial number (if known), registration number, or inter partes proceeding number for which the original power of attorney was filed; and the name of the party who signed the power of attorney; or, if the application serial number is not known, submit a copy of the application or a copy of the mark, and specify the filing date. 37 C.F.R. §2.17(d)(2). If the applicant or registrant meets these requirements, the USPTO will accept the power of attorney.