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Kathryn Bi


Experienced intellectual-property litigator focused on complex technology disputes, including patent infringement cases.

Kathryn helps clients resolve their toughest intellectual property and commercial cases, with emphasis on patent and trade-secret disputes. She oversees case strategy and management from inception to trial and has extensive experience with all aspects of patent litigation.

Kathryn’s work for defendants includes briefing and arguing a summary judgment motion that secured a finding of non-infringement of the sole patent-in-suit for her client. She also led a bench-trial team to a full trial victory, cross-examining the opposing party’s primary expert.

Kathryn’s work for plaintiffs includes examining the plaintiff’s medical expert in a medical-device-patent trial that resulted in a jury verdict of infringement. On behalf of a streaming-technology company, Kathryn led several multi-patent cases, defeating motions to dismiss under 35 U.S.C. § 101 and developing a claim-construction strategy that resulted in favorable settlements with all defendants.


J.D., University of Chicago Law School
  • with honors
  • Member, University of Chicago Law Review
B.E., Chemical Engineering, Dartmouth College


Law Clerk, Hon. Leonard P. Stark, U.S. District Court, Delaware, 2015-2016

Professional history

  • Davis Polk since 2020

Qualifications and admissions

  • State of California
  • State of New York
  • U.S. Court of Appeals, Federal Circuit
  • U.S. Court of Appeals, Second Circuit
  • U.S. District Court, C.D. California
  • U.S. District Court, E.D. New York
  • U.S. District Court, S.D. New York
  • U.S. Patent & Trademark Office
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