37 CFR § 11.14 - Individuals who may practice before the Office in trademark and other non-patent matters.
(a) Attorneys. Any individual who is an attorney as defined in § 11.1 may represent others before the Office in trademark and other non-patent matters. An attorney is not required to apply for registration or recognition to practice before the Office in trademark and other non-patent matters. Registration as a patent practitioner does not itself entitle an individual to practice before the Office in trademark matters.
(b) Non-lawyers. Individuals who are not attorneys are not recognized to practice before the Office in trademark and other non-patent matters, except that individuals not attorneys who were recognized to practice before the Office in trademark matters under this chapter prior to January 1, 1957, will be recognized as agents to continue practice before the Office in trademark matters. Except as provided in the preceding sentence, registration as a patent agent does not itself entitle an individual to practice before the Office in trademark matters.
(1) Any foreign attorney or agent not a resident of the United States who shall file a written application for reciprocal recognition under paragraph (f) of this section and prove to the satisfaction of the OED Director that he or she is a registered and active member in good standing before the trademark office of the country in which he or she resides and practices and possesses good moral character and reputation, may be recognized for the limited purpose of representing parties located in such country before the Office in the presentation and prosecution of trademark matters, provided: The trademark office of such country and the USPTO have reached an official understanding to allow substantially reciprocal privileges to those permitted to practice in trademark matters before the Office. Recognition under this paragraph (c) shall continue only during the period that the conditions specified in this paragraph (c) obtain.
(2) In any trademark matter where a foreign attorney or agent authorized under paragraph (c)(1) of this section is representing an applicant, registrant, or party to a proceeding, an attorney, as defined in § 11.1 and qualified to practice under paragraph (a) of this section, must also be appointed pursuant to § 2.17(b) and (c) of this chapter as the representative who will file documents with the Office and with whom the Office will correspond.
(d) Recognition of any individual under this section shall not be construed as sanctioning or authorizing the performance of any act regarded in the jurisdiction where performed as the unauthorized practice of law.
(e) Appearance. No individual other than those specified in paragraphs (a), (b), and (c) of this section will be permitted to practice before the Office in trademark matters on behalf of a client. Except as specified in § 2.11(a) of this chapter, an individual may appear in a trademark or other non-patent matter in his or her own behalf or on behalf of:
(1) A firm of which he or she is a member;
(2) A partnership of which he or she is a partner; or
(3) A corporation or association of which he or she is an officer and which he or she is authorized to represent.
(f) Application for reciprocal recognition. An individual seeking reciprocal recognition under paragraph (c) of this section, in addition to providing evidence satisfying the provisions of paragraph (c) of this section, shall apply in writing to the OED Director for reciprocal recognition, and shall pay the application fee required by § 1.21(a)(1)(i) of this subchapter.