David is a litigation and transactional attorney whose legal, business, and scientific careers span over two decades. David leverages his diverse educational and experiential background to provide pragmatic solutions to complex legal and business issues, earning him board, advisory, and executive positions in multiple industries.

David’s practice focuses on intellectual property matters and complex commercial litigation. He represents numerous clients in patent, copyright, and trademark matters in a wide range of fields, including pharmaceuticals, medical devices, arts and entertainment, computer hardware and software, Web3/metaverse, virtual reality, and blockchain technologies. David is also the author of “Qualifying and Attacking Expert Witnesses,” a book that teaches both experienced attorneys and expert witnesses how to win cases through strategic expert discovery. David has also served as an expert witness in pharmaceutical and malpractice matters. Prior to joining Glenn Agre Bergman & Fuentes, David was a partner at Lucas & Mercanti, LLP and a research scientist at Pfizer, Inc., where he synthesized pharmaceutical compounds for the treatment of cardiovascular and metabolic diseases.

David has represented:

  • Numerous publicly traded and private pharmaceutical companies in ANDA and other patent infringement matters concerning multiple drug products, including Miacalcin®, Exelon®, Welchol®, Savella®, Multaq®, Lymphazurin®, Riomet®, and Jublia®.
  • Various startups providing outside general counsel and business services in multiple industries.
  • Several clients in Inter Partes Review (IPR) matters both challenging and defending pharmaceutical patents, including those covering Lymphazurin® and Mydayis® drug products.
  • Corporations and business owners in complex licensing and contract disputes, including arbitration proceedings concerning the outcome of clinical trials.
  • Startups and corporations providing intellectual property advice and strategy, including negotiations to purchase and sell intellectual property.
  • CEO in white-collar criminal defense concerning off-label promotion of medicine.
  • The painting known and described as Madonna and Child as defendant-in-rem in the forfeiture matter United States of America v. The Painting Known and Described as Madonna and Child.
  • Multiple businesses, firms, entrepreneurs, inventors, and artists in a wide range of matters including construction, securities, legal malpractice, movies and television, virtual reality, fine art, blockchain technology, metaverse/Web3, and cannabis.
  • Qualifying and Attacking Expert Witnesses, James Publishing, Read here.
  • It is Not Fair to Leap Frog Expert Disclosure Requirements: An Analysis of HVLPO2 v. Oxygen Frog, IPWatchdog (March 3, 2020), Read here.


  • University of Connecticut School of Law, J.D., 2006
    • Intellectual Property Notes, Editor
  • University of Connecticut, B.S., magna cum laude, Phi Beta Kappa, 2009



  • State Bar of New York
  • State Bar of Connecticut
  • U.S. District Court, Southern District of New York
  • U.S. District Court, Eastern District of New York