• Northwestern University, B.S. Mechanical Engineering (1979)
  • DePaul University College of Law, J.D. (1982)
  • Illinois Institute of Technology, Graduate Coursework Computer and Electrical Engineering (1990)


  • Illinois
  • Supreme Court of the United States
  • U.S. Patent and Trademark Office (USPTO)
  • U.S. District Court, Northern District of Illinois, Trial Bar
  • U.S. Court of Appeals, Federal Circuit
  • Illinois Supreme Court

Professional Experience

  • DePaul University College of Law
    Adjunct Professor, 1995–1997
  • United States Department of Energy
    Patent Attorney, 1985–1989


  • Spanish

Gustavo Siller


“To be an effective counselor, you have to understand the client’s industry and their overall business goals.”

Gustavo Siller Jr. helps companies navigate U.S. intellectual property laws to protect their investment in technology and to identify and minimize the risks of bringing sophisticated technology into the markets. He is experienced in helping companies decide when to litigate and when to settle and in executing individualized dispute-resolution strategies for best results.

Gus’s diverse background in telecommunications, computer, electrical, and mechanical engineering is invaluable to companies involved in telecommunications and internet technology, analog and digital technology, medical devices, semiconductor technology, expert systems, and software-related technology.

As a litigator, Gus helps enforce intellectual property rights in innovation against infringement and leverage the rights through licensing and other transactions. He has also defended technology companies against infringement claims brought by both competitors and NPEs.

Gus helps companies advance and execute portfolio development strategies to protect their technology investment. He supervises portfolios containing thousands of new patents each year to help execute business strategies.

He works with companies from China, Japan, and Korea to identify and minimize the risks of bringing sophisticated technology to U.S. markets.


  • Law Bulletin Publishing Company: Leading Intellectual Property Lawyer, Leading Lawyers Network, 2015–2019
  • Crain's Custom Media: Chicago's Notable Minority Lawyer, 2018
  • Illinois Super Lawyers: Intellectual Property Litigation, 2005–2016


Professional Activities and Memberships

  • American Bar Association 
    Litigation Section
    Intellectual Property Law Section
  • Intellectual Property Owners Association
  • Licensing Executives Society

Representative Matters

Gus achieved a favorable settlement for LG Electronics in a patent infringement action involving cellular telephones and tablets. He defended LG Philips LCD (now LF Display Co.) in an infringement action brought by several patent holding companies, which settled after Gus filed summary judgment motions. Gus achieved a favorable settlement for Power Measurement Ltd. and Power Measurement Inc. in an action alleging antitrust violations and tortious interference with a prospective business relationship in an unfair competition against General Electric Co. He also defended Power Measurement in a 10-patent infringement action brought by General Electric related to digital power monitoring systems.


  • "Minority Powerbrokers Q&A: Brinks' Gustavo Siller Jr." Law360 (December 8, 2014). Author: Gustavo Siller
  • "Feature Article: Leading Law Firm Rainmakers - 2010," Diversity & the Bar (November/December 2010). Author: Gustavo Siller
  • "Managing the IP "Wine Cellar"" Corporate Legal Times (November 2005). Author: Gustavo Siller
  • "Patent and Trade Secret Protection of Computer Technology Siller, et al., " Software Law Journal (April 1993). Author: Gustavo Siller

Press Coverage

Firm News & Announcements

June 29, 2022 Crowell & Moring Remembers Henry L. Brinks, Longtime Pillar of Nation’s Patent Bar
July 2, 2021 Crowell & Moring and Brinks Gilson & Lione Join Forces