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Warren L. Nachlis Ph.D.


(T) +1.212.326.8364
(F) +1.212.755.7306
(T) +1.617.449.6941
(F) +1.617.449.6999


  • New York University (J.D. 1997); University of Massachusetts, Amherst (Ph.D. in Polymer Science and Engineering 1993); Franklin & Marshall College (B.A. in Chemistry 1987; Phi Beta Kappa)

Bar Admissions

  • Massachusetts, New York, and registered to practice before the U.S. Patent and Trademark Office

Warren Nachlis, co-leader of the Licensing & Technology Transactions group within the Firm's IP Practice, focuses on licensing and technology transactional matters for clients worldwide.

His practice includes a wide range of intellectual property-related matters, including licensing, joint ventures, joint development agreements, sponsored research agreements with academic and nonprofit organizations, development and supply agreements, technology issues, and strategic intellectual property counseling. Warren also routinely advises clients on intellectual property issues that arise in connection with larger corporate transactions such as mergers and acquisitions, capital markets offerings, secured lending transactions, asset securitizations, and private equity investments.

Warren has experience in a broad spectrum of technology areas with particular emphasis in the pharmaceutical, biotechnology, medical device, electronics, media, entertainment, and financial information industries. His representative clients include Astellas, Astra Zeneca, Celgene, City of Hope, Essilor, H. J. Heinz, Jefferies & Company, sanofi-aventis, SAP, Symphony Capital, and Verint Systems. In addition, Warren's experience includes patent litigation and interference matters, and he has a strong technical background in polymers, pharmaceuticals, chemistry, and biology.

Warren is a member of the Licensing Committee of the Intellectual Property Owners Association.

Honors & Distinctions

  • Named in The Legal 500 US since 2008, which notes that he is well known for his technology transactions work

    IAM Patent 1000 – The World's Leading Patent Practitioners since 2012

    "Life Sciences Star," Euromoney's LMG Life Sciences since 2012

    Managing Intellectual Property — IP Star since 2014

    Massachusetts Super Lawyers (2017-2018)
Warren Nachlis