37 CFR § 11.704 - Communication of fields of practice and specialization.
(b) A registered practitioner who is an attorney may use the designation “Patents,” “Patent Attorney,” “Patent Lawyer,” “Registered Patent Attorney,” or a substantially similar designation. A registered practitioner who is not an attorney may use the designation “Patents,” “Patent Agent,” “Registered Patent Agent,” or a substantially similar designation. Unless authorized by § 11.14(b), a registered patent agent shall not hold himself or herself out as being qualified or authorized to practice before the Office in trademark matters or before a court.
(2) The name of the certifying organization is clearly identified in the communication.
(e) Individuals granted limited recognition may use the designation “Limited Recognition” but may not hold themselves out as being registered.
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