Kathleen Duffy focuses on intellectual property litigation, including matters before the USPTO TTAB and patent medical device cases. She also maintains an active pro bono docket and is a member the firm’s WISE affinity group.

Ms. Duffy earned her JD/MBA at American University, during which time she interned at the DC Court of Appeals for the Honorable Judge John Fisher, clerked in a general counsel’s office and worked at a small law firm directly with the managing partner. Prior to pursuing her advanced degrees, Ms. Duffy interned in the DC office of US Senator Pat Toomey (R-PA) while completing dual biology and political science majors at Bucknell University.


  • Apparel company in defending its trademark application.
  • Medical device company in protecting patents from infringement and unfair competition.
  • Multiple clients in complex discovery disputes before the TTAB.
  • Apparel company in defending famous trademark against alleged infringers.


Lit Alerts—June 2022
A Publication of the Litigation Practice Group
Lit Alerts—April 2022
A Publication of the Litigation Practice Group
Lit Alerts—February 2022
A Publication of the Litigation Practice Group


  • JD, Intellectual Property Law, American University Washington College of Law, 2020, cum laude
  • MBA, American University Kogod School of Business, 2020, cum laude
  • District of Columbia
  • New York
  • US District Court, Southern District of New York
  • Junior Member of The Union League of Philadelphia

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