Photograph of Gustavo Siller


  • 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 for the Northern District of Illinois, Trial Bar
  • U.S. Court of Appeals for the 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

Phone: +1 312.321.4249
455 N. Cityfront Plaza Drive
Suite 3600
Chicago, IL 60611

Gus Siller is the co-chair of Crowell & Moring's Technology & Intellectual Property Department. His 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. Gus has developed a particular niche helping Asian companies navigate U.S. intellectual property protection laws. 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 is a licensed patent attorney with experience in patent prosecution and post-grant proceedings. As a litigator, he has defended clients against infringement claims by both competitors and NPEs. Gus supervises portfolios containing thousands of new patents each year, protecting innovation against infringement and leveraging it through licensing and other transactions. He works with companies from China, Japan, and Korea to identify and minimize the risks of bringing sophisticated technology to U.S. markets.

Gus achieved a favorable settlement for LG Electronics in a patent infringement action involving cellular telephone 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 judgement motions. Gus achieved a favorable settlement for Power Measurement Ltd. and Power Measurement Inc. in an action alleging antitrust violations, tortious interference with a prospective business relationship in an unfair competition against General Electric Co. He also defended the Power Measurement in a 10-patent infringement action related to digital power monitoring systems brought by General Electric.

Prior to joining Crowell & Moring, Gus was the president of Brinks Gilson & Lione.