[W]e find that the unique roles of patent agents, the congressional recognition of their authority to act, the Supreme Court’s characterization of their activities as the practice of law, and the current realities of patent litigation counsel in favor of recognizing an independent patent-agent privilege. Litigators  –  put your discovery pencils down. Inventors –pick up the phone and call your patent agent.  The Federal Circuit is continuing the Jaffee [i] “evolutionary development of testimonial privileges”…