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Daniel (Dan) J. O'Connor

Baker & McKenzie LLP


Daniel J. O’Connor is a seasoned patent trial lawyer, both jury and non-jury. His practice includes all aspects of patent litigation — substantive and procedural — including infringement, invalidity, enforceability and patent damages. He advises on equitable remedies applicable to patent cases, including preliminary and permanent injunctions. He also counsels on and evaluates patent rights and obligations in a due diligence context. Mr. O’Connor co-authored the article "New Patent Term Affects US Licensing", and has spoken before professional and business groups on patent topics in the US and abroad.

Practice Focus

Mr. O’Connor specializes in intellectual property litigation, primarily patent and patent-related matters such as licensing and patent ownership disputes. He is experienced in handling litigation and disputes arising under patent and trade secret licenses, and in construing and drafting intellectual property licenses for purposes of liability or enforcement. He has represented both patent holder or licensee and accused infringer in direct actions and declatory judgment actions, and has supervised cases in various aspects of the electrical, chemical and mechanical arts.


  • Illinois~United States (1974)
  • U.S. Court of Appeals, Federal Circuit~United States
  • U.S. Court of Appeals, Seventh Circuit~United States


  • Georgetown University Law Center (J.D.) (1974)
  • University of Notre Dame (Master of Arts) (1971)
  • Loyola University, Chicago (B.A.) (1969)


  • English