Arnold & Porter

Intellectual Property Department

New York
Current View:

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What the team is known for Well-regarded patent litigation practice that attracts high-profile clients in the life sciences and technology spaces. Enjoys a fine reputation for its work in USPTO proceedings as well as district and federal court litigation. Frequently engaged for its Hatch-Waxman expertise.

Strengths A client reports: "They are timely in their responses, provide a holistic view and have real insight into the business."

Work highlights Defended Sanofi in a patent retrial brought by Amgen in the District of Delaware in relation to the cholesterol-reducing antibody drug Praluent.

Notable practitioners


Louis Ederer
has longstanding experience in the trademark sector, counseling clients on clearance, prosecution and opposition. His practice also extends to copyright and trade dress infringement, frequently acting for luxury brands.


Paul Llewellyn
routinely represents clients in a range of trademark and trade secrets proceedings, and has experience across a broad range of industries including pharmaceuticals and food and beverages. A commentator characterizes him as a "fantastic trademark litigator," while another interviewee comments: "He is very responsive, and provides insightful and practical legal advice."