Patrick Nack-Lehman


Thank you for your interest. Before you communicate with one of our attorneys, please note: Any comments our attorneys share with you are general information and not legal advice. No attorney-client relationship will exist between you or your business and O’Melveny or any of its attorneys unless conflicts have been cleared, our management has given its approval, and an engagement letter has been signed. Meanwhile, you agree: we have no duty to advise you or provide you with legal assistance; you will not divulge any confidences or send any confidential or sensitive information to our attorneys (we are not in a position to keep it confidential and might be required to convey it to our clients); and, you may not use this contact to attempt to disqualify O’Melveny from representing other clients adverse to you or your business. By clicking "accept" you acknowledge receipt and agree to all of the terms of this paragraph and our Disclaimer.


Patrick Nack-Lehman is an Intellectual Property and Technology associate in O’Melveny’s Silicon Valley office. Patrick focuses his practice on patent and technology-related litigation.

His litigation experience spans state and federal courts in California, including patent infringement, trade secret misappropriation, and false advertising cases. His experience includes discovery, motion practice, expert work, trial preparation, and trial. Patrick also counsels clients on a range of intellectual property and business matters, including open source software licensing, copyright analysis, and trademark enforcement.

Patrick has experience with a variety of technical areas, ranging from video streaming and computer networking to medical devices. He holds a Bachelor’s and Master’s degree in chemistry, and worked in an academic research laboratory for three years, studying metalloenzymes using various spectroscopic techniques.


Bar Admissions

  • California

Court Admissions

  • US District Court, Central District of California


  • Santa Clara University, J.D.
  • University of California at Davis, M.S.
  • University of California at Los Angeles, B.S.

Professional Activities


  • Co-Author, “Life Sciences at the ITC: Predictions and Considerations for Biosimilar Litigation,” The American Bar Association’s Landslide Magazine
  • Part of team defending streaming video service in an ongoing patent infringement case involving aspects of database management techniques (C.D. Cal.)
  • Part of team representing medical device manufacturers in litigation relating to the companies’ pelvic mesh products (Cal. Sup. Ct.)
  • Part of team that defended biopharmaceutical company against trade secret and other claims alleging that the company and related individuals misappropriated a competitor’s trade secrets to produce biosimilar versions of certain medicines (N.D. Cal.)