Mind + Muscle

technical minds + legal muscle

Sterne Kessler Goldstein Fox
Mark W. Rygiel

Mind + Muscle

Mark W. Rygiel



Mark Rygiel, a director in the Mechanical Group, counsels a broad spectrum of entities ranging from large multi-national companies to small start-ups in developing IP strategies and protecting new technologies.  Mr. Rygiel specializes in obtaining utility and design patent protection for cutting edge technologies in the consumer product, vehicle system, medical device, manufacturing, and e-commerce industries.  His practice also focuses on complex post-grant proceedings at the USPTO, analyzing patents for validity, infringement, and freedom-to-operate issues and providing related opinions of counsel, and counseling on IP due diligence in connection with portfolio acquisitions.

Mr. Rygiel manages large patent portfolios with a comprehensive approach that considers the client's most important products, business goals, competitor positioning and market conditions.  He has extensive experience drafting and prosecuting utility and design patent applications and is recognized for his knowledge in the following technical areas: footwear and athletic apparel, physiological sensor systems, laboratory instrumentation, respiratory and ventilation equipment, catheters and grafts, retinal surgery devices, engines and engine brakes, natural gas distribution systems, location-based services, and e-commerce promotions and related technology.  He has presented numerous lectures on effective patent portfolio management strategies, particularly tactics under the America Invents Act of 2011.

Mr. Rygiel provides counsel on both offensive and defensive patent strategies to help his clients achieve their business goals.  He has rendered numerous invalidity, non-infringement, and freedom-to-operate opinions and has navigated IP due diligence issues in the mechanical and electrical arts.  He also has successfully negotiated contentious matters in the consumer products and e-commerce marketing spaces through settlements and unique development and licensing agreements.

In the area of patent reexaminations, Mr. Rygiel has served as lead or second chair reexamination counsel to large corporations in matters relating to critical client products. Most recently, he has engaged in proceedings involving athletic performance monitoring, vehicle system, and laminate flooring technologies.  He is familiar with the challenges faced in both ex parte and inter partes proceedings and has a proven track record of success for both patent owners and third-party requesters.

Mr. Rygiel is a contributing author of Patent Office Litigation, Second Edition, published in 2017, and the two-volume set Patent Office Litigation, published in 2012 by Thomson Reuters Westlaw. The first edition focuses on the new contested proceedings under the America Invents Act, while the second edition provides a fresh and comprehensive exploration of these proceedings. Both books examine how the proceedings interact with other aspects of patent procurement and enforcement, and deliver practical analysis and advice.

Prior to joining Sterne Kessler, Mr. Rygiel worked as a business and information technology consultant for a large consulting firm where he designed manufacturing process systems, including a mill operations system for a large steel manufacturing plant.  He also interned in the mechanical engineering department of a large respiratory device company.  At George Washington University Law School, Mr. Rygiel was a member of The Environmental Lawyer law journal.  At the University of Notre Dame, Mr. Rygiel received a Notre Dame Scholar award and several steel industry related engineering scholarships.

  • Admissions
      • District of Columbia

      • Pennsylvania

      • United States Patent and Trademark Office

  • Education
    • J.D., The George Washington University

    • B.S., Mechanical Engineering, University of Notre Dame


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