37 CFR 4.6: Attorneys and Agents.

Complaints against registered patent attorneys and agents will not be treated under this section, unless a complaint fairly demonstrates that invention promotion services are involved. Persons having complaints about registered patent attorneys or agents should contact the Office of Enrollment and Discipline at Mail Stop OED, Director of the United States Patent and Trademark Office, PO Box 1450, Alexandria, Virginia 22313-1450, and the attorney discipline section of the attorney's state licensing bar if an attorney is involved.