Mr Mark D. Sweet > Finnegan, Henderson, Farabow, Garrett & Dunner LLP > Washington DC, United States > Lawyer Profile

Finnegan, Henderson, Farabow, Garrett & Dunner LLP
WASHINGTON, DC 20001-4413
United States

Work Department

Intellectual Property




Mark Sweet, chair of Finnegan, focuses his practice on portfolio analysis; due diligence investigations; interference proceedings; reissue and reexamination proceedings; preparing patentability, validity, and infringement opinions; and client counseling. Mark is a registered patent attorney with extensive experience handling procurement matters before the U.S. Patent and Trademark Office (USPTO), including patent application drafting and prosecution, conducting examiner interviews, filing appeals to and presenting oral arguments before the Patent Trial and Appeal Board (PTAB) of the USPTO, interference proceedings, reissue proceedings, and reexamination proceedings. Mark also has significant experience in inter partes review (IPR) and post grant review (PGR) proceedings.


Catholic University of America, Columbus School of Law
J.D., 1998
College of William and Mary
B.S., Chemistry, 1988

Lawyer Rankings

United States > Intellectual property > Trade secrets (litigation and non-contentious matters)

Full-service IP firm Finnegan, Henderson, Farabow, Garrett & Dunner LLP assists client with patent, trademark, trade secret and copyright law, notably counselling, prosecution, licensing and litigation matters. Key names among the deep the bench of IP experts that make up the practice are Anand Sharma, Mark Sweet and John Williamson (all based in Washington DC) and Robert McCauley III in Palo Alto.

United States > Intellectual property > Patents: litigation (International Trade Commission)

IP boutique Finnegan, Henderson, Farabow, Garrett & Dunner LLP is very well suited to ITC investigations that are part of wider patent disputes involving district court and PTAB proceedings. In recent highlights, the practice impressed with its representation of respondents from the technology sector, namely notable drone and solar cell manufacturers. With its headquarters in Washington DC and offices in Seoul, Shanghai, Taipei and Tokyo (in addition to other US offices and a London office), the firm is strongly positioned for ITC investigations involving Asian companies. Practice head Smith Brittingham  and Mareesa Frederick are the key contacts. Anand Sharma, the firm’s managing partner, and Mark Sweet, who chairs the firm, are the leaders of the wider practice.

United States > Intellectual property > Patents: litigation (full coverage)

Finnegan, Henderson, Farabow, Garrett & Dunner LLP, one of the few IP boutique giants in the US, houses a very deep bench of experienced litigators, able to cover an impressive number of sectors thanks to longstanding experience and a high number of practitioners holding advanced scientific and engineering degrees.  In addition to its busy district court and Federal Circuit practice, the group is also among the most active players in PTAB disputes. The ITC specialists contribute their expertise in proceedings brought in import-related matters. Disputes from the pharmaceutical sector, including Hatch-Waxman litigation, and from the technology, telecoms, semiconductor and electronics sectors account for a particularly significant portion of the caseload. With offices in Washington DC, Atlanta, Palo Alto, Boston and Reston the firm has deep roots in the US, with its international offices in London, Seoul, Taipei, Tokyo and Shanghai providing the bases abroad for cross-border matters in key markets. Managing partner Anand Sharma, chair Mark Sweet, Frank DeCosta as the leader of the litigation section, PTAB trials section lead Joshua Goldberg and Michael Jakes as the head of the firm’s appellate section are all based in the Washington DC office. Charles Lipsey in the Reston office is another key name.

United States > Intellectual property > Patents: prosecution (including re-examination and post-grant proceedings)

Finnegan, Henderson, Farabow, Garrett & Dunner LLP‘s substantial team is among the most experienced and versatile groups in the market. The IP mega-boutique is a one-stop-shop for patent matters, with the prosecution practice being one of the core practice pillars. Under the lead of Joshua Goldberg, the firm also remains a key player at the PTAB, with proceedings including inter partes reviews, ex parte proceedings, post-grant reviews, and covered business method reviews. Clients entrust their utility and design patent portfolios to the firm. The practice is a very good choice for US clients and multinationals alike, thanks to its US footprint with the main office in Washington DC and other offices in Reston, Palo Alto, Boston, Atlanta, coming in addition to its international presence in London, Seoul, Shanghai, Taipei, and Tokyo. Managing partner Anand Sharma, chair Mark Sweet and patent office section head Jill MacAlpine are, like Goldberg, based in Washington DC. Erika Harmon Arner, the Reston-based leader of the firm electrical and computer technology practice group and a PTAB expert, is also noted.

United States > Intellectual property > Patents: licensing

Finnegan, Henderson, Farabow, Garrett & Dunner LLP covers stand-alone licensing and collaboration agreements, the licensing aspects of significant transactions, including the necessary due diligence, and settlement agreements in patent litigation conducted by the firm’s litigators. With its strength in patent litigation and prosecution, the firm is a very good choice for clients seeking seamless advice on the entirety of their patent portfolios. The IP boutique has offices in the US (Washington DC, Reston, Palo Alto, Boston, Atlanta), a London office, and four Asian offices in Seoul, Shanghai, Taipei and Tokyo; as a result, it is adept at handling domestic and cross-border matters and covers a broad sector range thanks to its substantial size. Strategic licensing agreements and transactions are areas of particular strength. Managing partner Anand Sharma and chair Mark Sweet, both based in the Washington DC office, are in charge of the firm. Fellow Washington DC-based Brian Kacedon is the key licensing contact.