Photo of Mark E. Stallion

Mark E. Stallion


Mark Stallion handles a wide array of IP matters and has a strong technical background with experience in electronics, software, AI, food science and numerous other areas. 


  • Missouri
  • U.S. Patent and Trademark Office


J.D., Saint Louis University School of Law, 1997

B.S., Electrical and Electronics Engineering, Georgia Institute of Technology, 1985


As a registered patent attorney with a background in engineering, Mark Stallion brings his intellectual property clients a strong combination of legal and technical knowledge. He handles patent and trademark prosecution and portfolio management, both domestic and foreign. He also renders patent infringement, validity and other opinions and advises in areas including:

  • Software, artificial intelligence, blockchain
  • Business methods, online marketing and advertising
  • Automated food processing and food science technology
  • Electrical, signal, audio and image processing, electro-optics
  • Manufacturing and electro-mechanical design
  • Mechanical, heavy equipment and robotics
  • Telecommunications and utilities
  • Petroleum exploration/production systems

Mark also provides patent litigation support and litigation management. His practice includes patent, copyright, trademark, trade secrets, technology agreements, confidentiality/nondisclosure agreements, employment/consulting agreements, cloud computing and social media policies and agreements, software escrow and data rights agreements and licensing agreements for open-source software. He also handles IP portfolio management, including intellectual property valuation and due diligence for mergers and acquisitions.  Mark represents Fortune 100 and Fortune 500 companies as well as mid-cap and startup companies.  Mark also represents various universities and research institutions assisting with their protection and commercialization efforts.

Mark previously spent more than a decade as a senior project engineer and engineering manager. His work included technical areas such as electronic, electro-mechanical, digital and analog signal processing, software, electro-optical, display/vision systems, IR/electronic airborne counter-measures, processor and control systems, digital map and radar image analysis for target recognition, and terrain following. He has drafted patent applications for many of these technologies as a patent attorney.

Mark is dedicated to mentoring local students as well as entrepreneurs. He has mentored high schoolers through Junior Achievement and served on the boards of the Independent Youth entrepreneurship organization and the Boys & Girls Clubs of America. In addition, he is a board member for Arch Grants, which provides funding to innovative startup companies, and for Venture Café, which is also a part of the startup community ecosystem.

Professional Affiliations

  • American Bar Association
  • The Bar Association of Metropolitan St. Louis
  • Mound City Bar Association

Community/Civic Activities

  • Arch Grants, board member
  • HBCU Consortium, founder
  • Independent Youth, Advisory Board
  • Leadership St. Louis
  • U.S. Patent and Trademark Office, Patent Pro Bono Program, Advisory Board
  • Boys & Girls Clubs of Greater St. Louis, board chair
  • Venture Café, board member

Honors & Awards

Honors & Awards

  • The Best Lawyers in America, Intellectual Property Law, 2010; Copyright Law, 2014-2023; Patent Law, 2019-2024
  • Top Patent Attorneys, St. Louis Small Business Monthly, 2018-2020
  • Best IP Attorneys, St. Louis Small Business Monthly, 2022
  • Intellectual Property Law Power List, Missouri Lawyers Media, 2022


Representative Matters

  • Patent preparation and prosecution, general portfolio management and opinion work for Fortune 100 and 500 companies in areas including automated industrial production systems.
  • Patent preparation and prosecution, general portfolio management and opinion work for public and private universities and research institutions.
  • Patent preparation and prosecution, general portfolio management and opinion work for universities in technology areas including electrical, electro-mechanical, software, bio-medical and bio-electrical technologies.

News & Insights


Seminars & Speaking Engagements


Articles & Books


This website uses cookies to improve functionality and performance. If you choose to continue browsing this website, you consent to the use of cookies. Read our Privacy Policy here for details.