Patent litigation attorney

Jack B. Blumenfeld

72 tracked appearances — 26 plaintiff · 46 defendant.

Specialty & background

Jack B. Blumenfeld is a highly regarded intellectual property litigator and Of Counsel at Morris, Nichols, Arsht & Tunnell LLP in Delaware. With a career spanning over four decades, his practice focuses on high-stakes patent litigation across a diverse range of technologies, including pharmaceuticals, biotechnology, medical products, software, computers, and telecommunications. His reputation as a "dean of the Delaware IP bar" is built on extensive experience in federal district courts and arguing before the U.S. Court of Appeals for the Federal Circuit.

The provided case data indicates a strong preference for defense-side work, where Mr. Blumenfeld has represented defendants in 11 of 14 tracked appearances. This defense focus is consistent with his role in cases such as Intent IQ LLC v. Viant Technology LLC, Datonics LLC v. Adobe Inc., and Dish Technologies L.L.C. v. fuboTV Inc. He has also represented plaintiffs, for instance in ANDA litigation for Veloxis Pharmaceuticals against Accord Healthcare and Sun Pharmaceutical Industries. While often serving as local counsel, a role he held in 12 of the tracked matters, he has also acted as lead counsel, as seen in Intent IQ, LLC v. Adform, Inc.

Mr. Blumenfeld has spent the majority of his tracked career at Morris, Nichols, Arsht & Tunnell, with a smaller number of appearances associated with Potter Anderson & Corroon. His clients have included major technology and pharmaceutical companies such as Google, Intel, Pfizer, Comcast, and Johnson & Johnson. While his district court and appellate experience is well-documented, specific experience in IPR or other PTAB proceedings is not prominent in publicly available sources.

Mr. Blumenfeld earned his J.D. from Yale Law School in 1977 and a B.A. from the State University of New York at Albany. He clerked for the Honorable Walter K. Stapleton of the U.S. District Court for the District of Delaware before entering private practice.

Firms

Roles

  • local counsel35
  • Local Counsel18
  • lead counsel5
  • Lead Counsel3
  • lead local counsel1
  • counsel1
  • of counsel1
  • Of Counsel1
  • Counsel for Defendant1
  • Delaware Counsel1
  • Lead Counsel, Local Counsel1
  • Attorney for Defendants1
  • lead or local counsel1
  • Counsel1
  • Local counsel1

Cases (72)