John S. Kern is a patent attorney in Oblon's Electrical practice group. With a strong foundation in engineering and technology, Mr. Kern brings a unique skill set and perspective to his practice that encompasses all aspects of patent law including, patent prosecution, litigation, and post-grant review proceedings. Mr. Kern is a skilled appellate practitioner, having years of experience before the USPTO Patent Trial & Appeal Board and its predecessor, the Board of Patent Appeals and Interferences. He has actively handled and advised on several inter-partes review (IPR) proceedings for his clients. Throughout his career, Mr. Kern has regularly drafted and prosecuted patent applications before the USPTO, as well as represented clients in reexamination matters. Additionally, Mr. Kern has successfully represented numerous clients in litigation before various district courts and the U.S. International Trade Commission.

A former electrical engineer, Mr. Kern has worked in diversified technologies throughout his legal career in the electrical, mechanical and software arts, including semiconductor devices, communication networks, medical devices, automotive technologies, display devices, printers, microlithography, nanotechnology, and analog/digital circuit design. He has counseled both small and large multinational corporations in designing and bringing new products to market. Some of Mr. Kern’s clients include leading semiconductor, telecommunications, and information technology companies.

Mr. Kern’s diverse intellectual property practice also includes considerable experience in preparing infringement and validity opinions, drafting claims to cover industry standards, and patent pool evaluation and administration.


  • George Mason University School of Law (J.D.)
  • Virginia Polytechnic Institute and State University (B.S.)
    • Electrical Engineering


  • Virginia
  • Registered to practice before the U.S. Patent and Trademark Office
  • U.S. Court of Appeals, Federal Circuit

Professional Affiliations

  • Virginia State Bar Association