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Finnegan, Henderson, Farabow, Garrett & Dunner LLP

Work +1 571 203 2700
Fax +1 202 408 4400
Atlanta, Boston, London, Palo Alto, Reston, Seoul and 4 more

Erika Harmon Arner

Work +1 571 203 2754
Finnegan, Henderson, Farabow, Garrett & Dunner LLP

Work Department

Intellectual Property


Erika Harmon Arner is a nationally-recognized leader in trial practice before the Patent Trial and Appeal Board (PTAB) and was named 2017 PTAB Litigator of the Year by Managing IP. She represents clients before the Federal Circuit, where she has argued and won appeals from the PTAB and district courts in technologies ranging from graphical user interfaces to complex telecommunications systems to large scale scent diffusion devices.


  • PTAB Bar Association
    (president, 2018-2019; president-elect, 2016-2017)
  • Intellectual Property Owners Association 
    (vice chair, U.S. Post-Grant Patent Office Practice, 2016-2017; vice chair, Patent Office Practice Committee, 2012-2014; vice chair, Software and Business Method Patents Committee, 2009-2011)
  • American Bar Association
    (Mark T. Banner awards committee, 2016-2017; patents editor, Landslide® magazine, 2012-2015; lead patents editor, Annual Review of Intellectual Property Developments, 2010-2012)
  • Virginia State Bar 
    (Intellectual Property Section Board of Governors, 2013-2015) 
  • American Intellectual Property Law Association 
    (Amicus Brief Committee, 2014-2015; Professional Programs Committee, 2014-2015)


Washington and Lee University School of Law
J.D., cum laude, 1999
College of William and Mary
B.S., Computer Science, 1993

United States: Intellectual property

Patent: prosecution (including reexamination and post-grant proceedings)

Within: Leading lawyers

Erika Harmon Arner - Finnegan, Henderson, Farabow, Garrett & Dunner LLP

Within: Patent: prosecution (including reexamination and post-grant proceedings)

Finnegan, Henderson, Farabow, Garrett & Dunner LLP‘s ‘very knowledgeable’ team fields a very active PTAB practice - the main focus of Reston’s Erika Harmon Arner and Atlanta’s Jason Stach - with a strong track record in covered business method reviews, post-grant reviews and inter partes reviews (IPR); the group is also exceedingly well versed in patent applications and portfolio strategy development, with experience including utility, plant and design patents and its large sectorial breadth renders possible a varied caseload that recently included strategic patent counselling for Vertex Pharmaceuticals regarding cystic fibrosis products. Washington DC-based managing partner Mark Sweet led advice for NanoFlex Power on its worldwide patent portfolio in relation to application drafting work and due diligence work regarding competitors, while Elizabeth Ferrill and Gregory Gramenopoulos, both also in Washington DC, assisted Google with design patent application preparation and counselling matters regarding graphical user interfaces and icons. Arkema engaged the team, here led by Sweet, Mark Feldstein and Brian Kacedon, for a representation in a post-grant review before the PTAB, challenging a Honeywell patent regarding automobile air conditioning chemicals. Other clients include AstraZeneca, Caterpillar and Toyota. Elliot Cook in Reston, Li Feng, Joshua Goldberg and Erin Sommers in Washington DC made partner and former Lead Administrative Patent Judge at the United States Patent and Trademark Office (USPTO) Trenton Ward joined the Atlanta office.

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