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David R. Lefebvre
+1 617 646 1652

Two Seaport Lane
Boston, MA 02210-2001

+1 617 646 1600
Fax +1 617 646 1666

Bar and Court Admissions

  • Massachusetts
  • U.S. Patent and Trademark Office
  • U.S. Court of Appeals, Veterans Claims


  • Suffolk University Law School
    J.D., cum laude, 2015
  • University of Massachusetts, Amherst
    B.S., Mechanical Engineering, cum laude, 2006

David R. Lefebvre


David Lefebvre focuses his practice on client counseling, patent prosecution, post-grant practice, and patent litigation. He assists with patent matters for established and developing companies in various industries with diverse technologies.

Mr. Lefebvre’s patent office practice includes strategic advice, drafting, and prosecuting U.S. and foreign patent applications. With more than four years of patent experience, he has assisted in prosecuting hundreds of patent applications. In addition to developing and executing comprehensive patent procurement strategies, Mr. Lefebvre evaluates patent portfolios for mergers, acquisitions, and investment opportunities. He has considerable experience securing freedom-to-operate, assessing competitive patent landscapes, and providing patentability, validity, noninfringement, and clearance opinions.

Prior to joining Finnegan as a student associate, Mr. Lefebvre worked as a field service engineer for Christ Water Technologies Americas, LLC and Koch Membrane System, Inc. (KMS). He also held the position of field service supervisor at KMS, a leading developer of process technology membrane solutions. In these roles, Mr. Lefebvre executed the startup and commissioning of new industrial and commercial fluid treatment systems. His experience allowed him to utilize various technologies, including membrane filtration, ion exchange, electrodeionization, evaporation, and degasification. Mr. Lefebvre was responsible for the software programming and automation of these highly automated mechanical and electrical systems.

Professional Recognition

  • Jurisprudence Award, Antitrust and Torts, Suffolk University Law School, 2012.

Professional Activities

  • American Intellectual Property Law Association
  • American Bar Association
  • Boston Patent Law Association