David is a patent litigator focused on electrical, mechanical, and software technology matters. He has achieved several complete wins for leading technology companies enforcing their rights against competitors attempting to copy successful products and against non-practicing entities. David also counsels clients in intellectual property licensing, evaluation, and procurement matters.

David is the leader of the Patents practice of BFKN’s Intellectual Property Group, as well as a partner in the Litigation and Corporate & Securities Groups. David has over 20 years of experience as an intellectual property litigator, counselor, and prosecutor representing large market cap to small privately-held clients in a wide range of industries. David’s client services include litigation, licensing, negotiations, patent portfolio development, product clearance, structuring intellectual property provisions, and due diligence analysis.

David has litigated before multiple United States District Courts, and is a member of the Trial Bar of the United States District Court for the Northern District of Illinois. He has also litigated before the Court of Appeals for the Federal Circuit, United States Supreme Court, International Trade Commission, and United States Patent and Trademark Office (USPTO). He leads trial teams, resolves patent infringement demands, and has argued on behalf of co-defendant groups. He has represented clients in inter partes review (IPR) proceedings in the USPTO and argued before the Patent Trial and Appeal Board (PTAB). David became registered to practice before the USPTO while still in law school.

David's transactional experience involves a wide range of technology matters, including a central role in providing guidance for the intellectual property acquisitions and deal evaluation for clients. He negotiates and drafts license agreements, evaluates joint development and acquisition targets, conducts product clearance, prepares invalidity opinions, and assists in patent portfolio enforcement strategies. He also helps to create and manage patent portfolios for large companies and startups. David also advises clients on protecting their key data through contractual obligations and intellectual property rights.

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With a technical background in electrical engineering, David has in-depth knowledge in electrical, mechanical, and software matters. David has activity represented clients and litigated in multiple technology areas, including semiconductor technology, x-ray tubes, computer networking hardware, wireless communications, biomedical devices, computer software, hearing instruments, gaming, signal processing, valves, mechanical assemblies, green technology, vehicle navigation systems, plastics, office seating, internet-based applications, monitoring systems, as well as fashion-related designs, including handbags, shoes, and watches.

Prior to joining BFKN, David began his legal career at an intellectual property boutique law firm, starting as a law clerk during law school and concluding as a partner, then he moved to an international law firm.



  • State of Illinois
  • U.S. Supreme Court
  • U.S. Court of Appeals - Federal Circuit
  • U.S. District Court - Northern District of Illinois (Trial Bar)
  • U.S. District Court - Eastern District of Michigan
  • U.S. District Court - Eastern District of Texas
  • U.S. Patent and Trademark Office


  • Northwestern University Pritzker School of Law, J.D., 1999
  • University of Illinois at Urbana-Champaign, B.S., Electrical Engineering, with honors, 1996




  • Leading Lawyers Network (2011-2023)
  • Super Lawyer, Illinois Super Lawyers (2014-2020, 2023-2024)
  • Rising Star, Illinois Super Lawyers (2008-2013)
  • Judicial Extern, Hon. Robert W. Gettleman, US District Court for the Northern District of Illinois (1998)
  • Legal Team Intern, Intel Corporation (1996)
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