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Bruce M. Wexler

Partner, Intellectual Property

brucewexler@paulhastings.com

Bruce Wexler is a partner in the Intellectual Property practice at Paul Hastings. Bruce is a trial lawyer with extensive experience litigating high-stakes patent cases in a range of technologies. He has represented clients as lead counsel in enforcement and defense matters involving multimillion- and multibillion-dollar drug products.

He forms close partnerships with his clients to support successful outcomes, including in their bet-the-company cases. In Hatch-Waxman Act matters, he has opposed challenges by most generic drug companies. He has helped his clients with important drug products such as Aricept®, Pradaxa®, Mirapex®, Cyltezo®, Basaglar®, Entereg®, Emend® oral and Emend® for Injection, Aciphex®, Banzel®, Gocovri®, Comirnaty® and Opsumit®.

REPRESENTATIONS

Achieved a complete trial victory in the U.S. District Court for the District of New Jersey for clients Eisai and Merck, successfully defending Eisai’s patent covering its life-saving Lenvima® cancer drug product.
  • Eisai Co., Ltd., Eisai Inc., MSD Oncology Holdings Ltd., et al. v. Shilpa Medicare Ltd.

Bruce served a lead counsel to Eisai as the petitioner defending a threat of infringement of Eisai’s lemborexant sleep drug product by successfully invalidating the patent in suit at the PTAB in a Post Grant Proceeding, on the ground of inherent anticipation.
  • Eisai Inc. v. Crystal Pharmaceutical (Suzhou) Co., Ltd.

RECOGNITIONS

  • Litigation Star and National Practice Area Star

    Benchmark Litigation Guide

  • Intellectual Property: Patent

    Chambers Global

PUBLICATIONS

  • Bruce’s writing has been published in numerous journals, including Forbes, Law360, IP Magazine, Managing IP and NYU’s Journal of Intellectual Property and Entertainment Law.

    SEPTEMBER 14, 2026

  • Bruce has been quoted frequently with regard to litigation and practice developments, including in the Wall Street Journal, Bloomberg News, Reuters, The Deal and The New York Times.

    SEPTEMBER 14, 2026

PAST ENGAGEMENTS

  • He is a regular speaker at legal seminars, including ACI’s Paragraph IV Disputes conference.
  • Bruce regularly provides his clients with in-house CLE presentations on a variety of topics of interest, and authors client alerts concerning important developments in the law.