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Sean counsels clients in connection with large IP portfolios and prepares and prosecutes patent, copyright, and trademark applications. His areas of technical experience include chemistry, food science, computer architecture, software, digital and analog circuit design, telecommunications and other communication systems, cell phones, GPS receivers and systems, electronics, manufacturing, LED systems, lighting and drivers, product packaging, medical devices, microprocessor-based instrumentation systems, and semiconductor circuit design and fabrication. Sean also has a robust design patent practice, including unique strategies and tactics for companies releasing thousands of new designs per year (as well as ordinary design patent protection).

His patent experience encompasses all aspects, including: patent application preparation and prosecution, product clearances, opinion letters, invalidating overbroad patents, representing clients on nine-figure patent deals, letter disputes, and technology transfers. Sean also assists clients on patent litigation matters.

Sean provides patent infringement counseling and represents clients involved in patent, trademark, trade dress, copyright, and information technology litigation. He also counsels clients on all aspects of intellectual property laws, including computer software licensing, protection and acquisition and managing intellectual property assets.

Sean is the author of “The Doctrine of Equivalents: The Second Prong of Patent Infringement Charges?” for the Ohio State Law Journal. He is a member of the American and Ohio State Bar Associations, and the American and Cleveland Intellectual Property Law Associations.

Sean served as an electrical engineer in the U.S. Air Force, designing microprocessor-based instrumentation systems. He joined Calfee in 1993 and became a partner with the firm in 2003.


J.D., with honors, The Ohio State University College of Law, Order of the Coif, 1993

B.S., cum laude, University of Michigan College of Engineering, 1986



  • Handling all aspects of three major IP projects for an American multinational medical devices and healthcare company, including (1) a current and emerging competitor monitoring project, which involves counseling the client regarding the activity of numerous competitors and potential competitors in the medical device space; (2) a competitor leverage project involving assisting the client with significant projects related to the assessment of key competitors, including analyzing key competitor products, identifying potentially relevant patents/patent families, evaluating potential infringement, and counseling the client regarding IP issues; and (3) a competitor IP analysis/monitoring project, which includes conducting monthly analyses of patent portfolios of several key competitors.
  • Serving as primary IP counsel for a publicly traded, Fortune 500, global manufacturing client and its operating companies with responsibility for the client's worldwide IP portfolio, including 1,000+ patent matters and 2,000+ trademark matters. With regard to clearance, Calfee provides right-to-use and non-infringement analyses and opinions. With regard to procurement, we provide patentability and registrability analyses and opinions. We also prepare, file, and prosecute patent and trademark applications. Calfee assists in all IP litigation the operating companies are involved in.

Professional & Community

Professional & Community

  • American Intellectual Property Law Association, Member
  • Cleveland Intellectual Property Law Association, Member
  • American Bar Association, Member
  • Ohio State Bar Association, Member

News & Events


Licensed In

  • Ohio
  • U.S. Patent and Trademark Office
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