Photograph of Gustavo Siller

Gustavo Siller


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.


  • 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)


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


Admitted to practice: Illinois, U.S. Patent and Trademark Office (USPTO), U.S Supreme Court, U.S. District Court for the Northern District of Illinois Trial Bar, U.S. Court of Appeals for the Federal Circuit, Illinois Supreme Court

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Chicago Daily Law Bulletin Profiles Shenzhen office Chicago Daily Law Bulletin (January 17, 2018)
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Gus Siller Mentioned in Yahoo! Finance Yahoo! Finance (January 18, 2017)
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"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

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Crowell & Moring LLP is an international law firm with offices in the United States, Europe, MENA, and Asia that represents clients in litigation and arbitration, regulatory and policy, and transactional and corporate matters. The firm is internationally recognized for its representation of Fortune 500 companies in high-stakes litigation and government-facing matters, as well as its ongoing commitment to pro bono service and diversity, equity, and inclusion.

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