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Eric J. Maiers focuses his practice on patent, trademark, copyright, trade secret, unfair competition, Internet and domain name matters, with an emphasis on patent litigation and patent prosecution in areas of computer hardware and software, business methods in eCommerce/Internet, electrical circuits, and semiconductors. His diversified experience involves all aspects of intellectual property, including enforcing and/or defending proprietary IP positions through litigation both in several of the U.S. District Courts, as well as before the U.S. International Trade Commission (ITC); managing patent and trademark portfolios; analyzing technology for patent pursuit strategies; overseeing the invention disclosure process; preparing and prosecuting U.S. and foreign patent, trademark, and copyright applications; contentious proceedings before the Patent Trial and Appeal Board (PTAB) and the Trademark Trial and Appeal Board (TTAB), including inter partes reviews (IPR) and trademark oppositions and cancellations; preparing infringement and patentability opinions; the acquisition and sale of intellectual property; licensing agreements, and Internet-related transactions.


  • Patent, trademark copyright, and trade secret litigation
  • Patent, trademark and copyright prosecution
  • Client counseling in all areas of intellectual property
  • Intellectual property transactions, including licensing agreements and analysis for IP due diligence matters
  • Technical areas of experience
    • Electrical circuits, both analog and digital, including memory controllers, temperature sensors, and amplifiers
    • Computer software, including file system level software, operating system level software, application level software, application programming interfaces, graphical user interfaces, client/server applications and video codecs
    • Computer hardware, including rack server design and hard drive design
    • Business methodology, particularly in eCommerce and other Internet-related areas
    • Networking systems, including both network hardware and software
    • Semiconductors and their methods of fabrication
    • Cellular phone hardware, software, and communication protocols
    • Digital video recorder (DVR) software
    • Digital TV signal processing



  • Obtained early, favorable settlement in defense of patent infringement suit relating to mobile music identification technology. Tune Hunter, Inc. v. LG Electronics U.S.A., Inc. (E.D. Tex. 2009)
  • Obtained dismissal of patent infringement suit through a pre-answer motion for summary judgment. Furnace Brook, LLC v. Aéropostale, Inc., Dick's Sporting Goods, Inc., and Levi Strauss & Company
  • Obtained dismissal of patent infringement suit through a motion for summary judgment of non-infringement, followed by a per curiam affirmation by the Court of Appeals for the Federal Circuit. Wi-LAN Inc. v. LG Electronics, Inc., et al.
  • Obtained outright dismissals of two petitions for inter partes review before the PTAB. Universal Remote Control, Inc. v. Universal Electronics, Inc.

Anerkennung durch den Markt

  • Listed, Leading Lawyers Network, 2022
    • Emerging Lawyer, 2015-2021
  • Listed, Managing IP Magazine's World IP Handbook and Survey, "IP Stars: Chicago Patents Stars and Trademark Stars," 2017-2021
  • Team Member, a U.S. News - Best Lawyers "Law Firm of the Year" in Trademark Law, 2020
  • Listed, The Legal 500 United States, Intellectual Property - Trademarks Litigation, 2019
  • Member, American Bar Association
  • Member, Illinois State Bar Association


Akademische Ausbildung
  • J.D., DePaul University College of Law
  • B.S., Electrical and Computer Engineering, University of Iowa
  • Illinois
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. District Court for the District of Colorado
  • U.S. District Court for the Eastern District of Texas
  • U.S. District Court for the Northern District of Illinois
  • U.S. Patent and Trademark Office