Ted J. Barthel, Partner


A patent attorney in the Intellectual Property Group, Ted works with sole inventors, start-up entities, emerging businesses and global Fortune 500 companies in protecting and leveraging their innovations for commercial advantage. Ted’s ability for framing intellectual property questions into practical business terms for decisions-makers is a real value-add for his clients. His strategic counsel enables clients to create cost-effective and meaningful intellectual property portfolios with tangible commercial value.

Ted’s work includes:

  • Strategic counsel - Advising decision-makers in the protection of key business innovations and the development of meaningful intellectual property portfolios
  • Patent counsel - Management of complex global patent portfolios; preparation/prosecution of patents in the U.S. and worldwide
  • Agreement work - Drafting and negotiating intellectual property license agreements
  • Opinion work - Preparing patentability, freedom-to-operate and patent noninfringement opinions
  • Trademarks - Providing trademark counsel to emerging businesses

Ted has drafted hundreds of patent applications and is well-versed in myriad technologies, including:

  • Chemical arts plastics/elastomers (polyolefins), adhesives, polyurethanes, wire and cable coating materials, automotive plastics/rubber, adhesives, polymerization production processes, organic light emitting diode compositions
  • Sustainable technologies solid-state hydrogen fuel, purified silicon, algae production, anaerobic digestion, biosolid remediation, desalination, solar thermal, water purification
  • eCommerce systems and Smartphone applications
  • Organic light emitting diodes and Semiconductor structures
  • Nano-/micro-layer film technology
  • Food science—food packaging and packaging adhesives, food products (confectionery, chewing gum and snack foods; food processing)
  • Medical products (medical devices, medical fluid delivery systems, pharmaceutical formulations)
  • Mechanical arts—consumer goods, clothing articles

Ted regularly lectures MBA students at the University of Wisconsin - Milwaukee on intellectual property topics.

Prior to entering the practice of law, Ted worked in industry as a production and research chemist at a leading global chemical, life science and biotechnology company.

He is a veteran of the U.S. Air Force, where he was a space operations officer with responsibilities for satellite launch, command and control and served as mission controller for the successful launch of Milstar Flight 2, a billion-dollar military communications satellite.

Ted began his military service touring as a jazz saxophonist/flutist with the U.S. Air Force Band.

Legal Services

Education and Honors

  • DePaul University College of Law (J.D.)
    • Lead Articles Editor, DePaul Journal of Art and Entertainment Law
  • Carroll College (B.A.)
    • Majors: Chemistry, German, Political Science
  • Universität Freiburg Germany
    • Junior Year Abroad Program

Bar Admissions

  • Illinois
  • Wisconsin

Court Admissions

  • U.S. District Court, Northern District of Illinois
  • U.S. Patent and Trademark Office

Professional and Civic Activities

  • American Intellectual Property Association (Member)
  • Mid-West Energy Research Consortium (Member)
  • Jackson Park Jazz Orchestra, Saxophonist
  • St. Thomas More Lawyers Society of Wisconsin - Board of Governors

Professional Recognition

  • The Best Lawyers in America®, Patent Law, 2021, 2022, 2023
  • The Best Lawyers in America®, Intellectual Property, 2021


  • German
Payment Portal

You are leaving the Quarles & Brady website and being directed to the bill presentment and paying service offered by a third party provider. If you do not wish to continue to the site, click Close or use the Back button on your web browser to return the Quarles & Brady website.