Joseph F. Haag


  • Vice Chair, Intellectual Property Department

Joseph Haag is an experienced intellectual property lawyer who focuses on patent litigation, patent prosecution and client counseling for patent matters. Since joining WilmerHale in 2001, Mr. Haag has successfully represented a variety of technology clients, including in areas such as electronic circuitry and devices, semiconductor fabrication and packaging, cellular telephone and wireless devices, and software. Over the course of his career, he has advised on many aspects of intellectual property and has represented clients in patent litigation in federal courts and before the International Trade Commission.

Mr. Haag has extensive patent prosecution experience for mechanical, electromechanical and software inventions, as well as in due diligence investigations for corporate transactions.

Mr. Haag also has extensive experience in all aspects of IP litigation. His recent patent litigations have involved technologies such as IT service management, electrochromic glass, cellular telephone and wireless devices, electronic devices and circuitry, non-volatile computer memory, lithography systems, and semiconductor fabrication and packaging.


  • Award Text

    Named a Northern California Super Lawyer for Intellectual Property Litigation

    Super Lawyers


  • Award Text

    Recognized as an IP Star

    Managing IP


  • Award Text

    Recommended for Intellectual Property: Trade Secrets and Patent Litigation

    The Legal 500 United States


  • Selected as a 2013–2024 IP Star by Managing IP, a guidebook that identifies leading IP lawyers in the United States.
  • Recommended in the 2016 and 2017 editions of The Legal 500 United States for intellectual property: trade secrets and intellectual property: patent litigation: full coverage.
  • Recognized in the 2010–2019 editions of Northern California Super Lawyers for his intellectual property litigation practice.
  • Named a "Massachusetts Super Lawyers' Rising Star" in intellectual property law in the May 2005–2007 issues of Boston Magazine.
  • Named to the Lawdragon 500 Leading Litigators in America list.

Insights & News


  • Education

    • JD, University of Minnesota, 1997

      magna cum laude Minnesota Law Review, Order of the Coif
    • BS, Mechanical Engineering, Northwestern University, 1994

  • Admissions

    • California

    • Massachusetts

    • US Patent and Trademark Office



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