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Finnegan, Henderson, Farabow, Garrett & Dunner LLP

Work +1 202 408 4000

Charles Van Horn

Work 202-408-4000
Finnegan, Henderson, Farabow, Garrett & Dunner LLP

Work Department

Intellectual Property


Charlie Van Horn is one of the leaders of Finnegan's patent prosecution practice and has a strong working knowledge of the specialized areas of patent reexamination, patent term extension, and procedures under the Patent Cooperation Treaty. Mr. Van Horn joined the firm after a 31-year career at the U.S. Patent and Trademark Office. During his tenure, he served in a variety of leadership positions relating to patent policy and practice. He served as the director of the patent examining group responsible for inventions in organic chemistry and biotechnology. While deputy solicitor, Mr. Van Horn argued cases in the federal courts. In his position as deputy assistant commissioner, he established the policy and practice for examining patent applications. Just prior to joining the firm, Mr. Van Horn assisted in developing the legislation and implementing the regulations and procedures for the patent-related changes mandated by the GATT-TRIPs agreement.


Mr. Van Horn has been a partner at Finnegan since 1998. Recognition: Recognized as a leading patent prosecutor in the D.C. area by Intellectual Asset Management, 2012-2014; Listed in LMG Life Sciences as an Intellectual Property: Life Sciences Star, 2012-2013.


American University, Washington College of Law (J.D., 1968); George Washington University (M.B.A., 1973); Lehigh University (B.S., Chemical Engineering, 1963)

United States: Intellectual property

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

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

Finnegan, Henderson, Farabow, Garrett & Dunner LLP has in-depth expertise and experience in patent office examinations, from prosecution, reexamination and reissue proceedings, to appeals before the Patent Trial and Appeal Board (PTAB) at the US Patent and Trademark Office (USPTO), where the group is highly recommended for representing petitioners and patent owners from a broad range of industries. The prosecution team files US and foreign patent applications for utility, design and plant inventions, and its patent office trials practice handles inter partes reviews (IPRs), post-grant proceedings and covered business method (CBM) reviews. The ‘phenomenal team’ includes the highly recommended Reston-based Erika Harmon Arner, who was appointed president of the PTAB Bar Association; Washington DC-based Charles Van Horn, who is ‘a luminary in his field’; chemical and biotech specialist Adriana Burgy, also based in Washington DC, who ‘provides exceptional thinking in terms of navigating patent prosecution in light of competing technology’; Atlanta’s Virginia Carron, who has ‘exceptional legal and practical business sense’; and, also in Atlanta, PTAB trial practice head Jason Stach, who represents clients before the PTAB and in Federal Circuit appeals stemming from reexaminations and court actions. Managing partner Mark Sweet (Washington DC) counts NanoFlex Power Corporation as his client, which he assists with its worldwide patent portfolio related to organic photovoltaic devices. Sweet and Reston-based Christopher Isaac are acting for Caterpillar in prosecuting several hundred utility and design patent applications in the US and elsewhere, assisting with opinions involving issues of patent validity and infringement, and handling IPR proceedings.

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